Definition

What Is Bipolar Disorder?

Bipolar disorder is a chronic mood disorder defined by the recurrent alternation between manic or hypomanic episodes (characterized by elevated or irritable mood, decreased need for sleep³, racing thoughts and impulsive behavior) and depressive episodes involving profound sadness, anhedonia, fatigue and cognitive impairment.

The exact cause is unknown: genes and differences in brain structure and function play a part⁴, and research is studying brain chemistry, stress hormones, cell energy and inflammation. Circadian rhythm disruption is both a trigger and a consequence of mood episodes.

Differences in gut bacteria and higher inflammatory markers are reported in bipolar disorder, but whether they cause mood episodes is unsettled.

⚠️ Important: Bipolar disorder requires professional psychiatric diagnosis and monitoring. Antidepressants used alone, without a mood stabilizer, can trigger manic episodes⁵ or rapid cycling in bipolar patients. Never discontinue psychiatric medications without physician guidance. Nutritional strategies described here are complementary and evidence-informed, not replacements for psychiatric care.

Types of Bipolar Disorder

⚡ Bipolar I

Defined by at least one full manic episode lasting ≥7 days (or any duration if hospitalization is required). Mania in bipolar I can include psychotic features, hallucinations or delusions, and is severe enough to cause marked functional impairment. Depressive episodes are common but not required for diagnosis. The most severe and recognizable form. Affects men and women equally.

🌊 Bipolar II

Characterized by hypomanic episodes (4+ days; elevated/irritable mood that does not cause severe impairment or psychosis) and major depressive episodes. No full manic episodes. It is often misdiagnosed as unipolar depression, because patients typically seek help during depression, not hypomania. Depression dominates: over 13 years of follow-up, depressive symptoms were present in half of all weeks and hypomanic symptoms in about 1 week in 80 ⁶. More common in women and often co-occurs with anxiety, eating disorders and ADHD.

🌦️ Cyclothymia & Rapid Cycling

Cyclothymia involves numerous hypomanic and depressive symptoms over ≥2 years that never meet full episode criteria, a chronic mood instability subtype. Rapid cycling (≥4 mood episodes per year) was present in about 16% of patients in a pooled analysis, is slightly more common in women and in bipolar II, and has been linked with an underactive thyroid and with antidepressant treatment⁷.

Signs & Symptoms

Symptoms of Bipolar Disorder

Bipolar disorder manifests across two distinct mood poles, each with characteristic symptoms, triggers and neurobiological profiles. Understanding both poles is essential for recognizing and managing the condition.

Symptom	What happens
Manic / Hypomanic Phase
Elevated or Irritable Mood	Persistently elevated, expansive or irritable mood lasting at least 4 days (hypomania) or 7 days (mania). Can feel euphoric, invincible or unusually creative, or, particularly in adolescents and males, present as marked irritability, agitation and hostility rather than euphoria.
Decreased Need for Sleep & Racing Thoughts	One of the most diagnostically specific features: sleeping only 2 to 4 hours yet feeling rested and energized. Accompanied by racing, rapid thoughts (flight of ideas), rapid speech (pressured speech), increased goal-directed activity and the subjective feeling that thoughts are moving faster than they can be expressed.
Impulsivity & Risk-Taking	Excessive involvement in pleasurable activities with high potential for harm: spending sprees, sexual indiscretion, reckless driving, impulsive business decisions, substance use. A single manic episode can cause lasting financial, legal or relational damage.
Grandiosity & Psychosis (Mania)	Inflated self-esteem or grandiosity, believing one has special powers, connections or missions. In full mania, psychotic features (delusions of grandeur, persecutory delusions, hallucinations) may emerge. The person typically lacks insight during the episode, a critical challenge in treatment adherence. Hospitalization is sometimes required for safety.
Depressive Phase
Profound Anhedonia & Sadness	Persistent depressed mood and loss of interest or pleasure in all (or nearly all) activities (anhedonia) for most of the day, nearly every day. Bipolar depression is often deeper and more persistent than unipolar depression, and is associated with higher rates of suicidal ideation. It accounts for the majority of functional impairment in bipolar disorder.
Cognitive Impairment & "Brain Fog"	Difficulty concentrating, forgetfulness, slowed thinking and impaired executive function (planning, organizing, decision-making). Cognitive deficits often persist between episodes (euthymia) and their causes are still being studied.
Fatigue & Psychomotor Changes	Severe fatigue and loss of energy, often out of proportion to activity level. Psychomotor retardation (slowed movements, speech and thinking) or, paradoxically, psychomotor agitation (restlessness, inability to sit still). Hypersomnia (sleeping 10 to 14 hours) is more common in bipolar depression than in unipolar depression.
Suicidality	Bipolar disorder carries the highest suicide risk of any psychiatric diagnosis, 20 to 30x higher than the general population¹². Risk is greatest during depressive episodes and mixed states (simultaneous manic energy + depressive despair). If you or someone you know has thoughts of suicide, call or text 988 in the US, or call 911 if a life is in danger¹³.

Treatment Comparison

Conventional and Holistic Treatment for Bipolar Disorder

🌿 HOLISTIC

💊 CONVENTIONAL

🌿

Holistic / Functional Approach

Omega-⁠3 and NAC as add-ons with mixed evidence, sleep and circadian regularity, and a healthy diet

Omega-⁠3 Evidence

Modest evidence for bipolar depression as an add-on, and essentially none for mania

NAC Evidence

In one placebo-controlled trial, adding NAC improved depressive symptoms over 24 weeks, and the gains were lost after stopping¹⁸; later results are mixed⁹

Timeline

In one trial, NAC benefits on functioning appeared by 8 weeks and on depression by 20 weeks, and were lost after stopping¹⁸; evidence for both NAC and omega-⁠3 is mixed⁹

Advantage

May help some people as an add-on to medication; not a replacement for it

Full Holistic Approach Includes

Omega-⁠3 fatty acids, which have modest evidence for bipolar depression as an add-on and essentially none for mania. Use triglyceride-form fish oil for best absorption.
N-Acetyl Cysteine (NAC, amount set by your prescriber), the glutathione precursor; one trial found improvement in depressive symptoms, and results since then are mixed
Magnesium glycinate, which acts on NMDA receptors in laboratory work; evidence in bipolar disorder is limited to small open studies
Lithium orotate, sold as a supplement, is not recommended: it still contains lithium, adds to any prescribed lithium, interacts with the same medicines and has no trial evidence in bipolar disorder. Do not take it without your psychiatrist
B complex (folate + B12), worth correcting where folate or B12 is low; test first
Vitamin D3 + K2, worth correcting where vitamin D is low⁹
Zinc, worth correcting where low; evidence in bipolar disorder itself is limited
A varied, fiber-rich diet; probiotics are being studied for mood but are not established in bipolar disorder
Circadian rhythm entrainment, consistent sleep/wake time (7 days/week), morning daylight and dimmer light in the evening. Bright light therapy lamps can trigger hypomania in bipolar disorder, so use one only with your psychiatrist. Circadian disruption both precedes and follows mood episodes

⚠️ Integration note: These nutritional strategies are adjunctive to, not replacements for, psychiatric medications in bipolar disorder. Any change to medication is planned with your psychiatrist. Always implement with the knowledge and supervision of your psychiatrist.

💊

Conventional / Medical Approach

Lithium, valproate, lamotrigine, atypical antipsychotics, quetiapine, psychotherapy (CBT, IPSRT)

Best-Evidenced

Lithium carbonate, the best-evidenced mood stabilizer; first-line for bipolar I and long-term maintenance

Mood Stabilizers

Valproate, lamotrigine (mainly for preventing bipolar depression), carbamazepine, oxcarbazepine

Atypical Antipsychotics

Quetiapine (most commonly used for both poles), olanzapine, aripiprazole, lurasidone (FDA-approved for bipolar depression)

Side Effects

Lithium: tremor, polyuria, hypothyroidism, kidney impairment long-term; Valproate: weight gain, teratogenicity (contraindicated in women of childbearing age); Olanzapine: severe weight gain, metabolic syndrome¹⁹; Quetiapine: sedation, weight gain, diabetes risk

Conventional Approach Includes

Acute mania: Lithium carbonate (starting dose set by your prescriber, adjusted to a blood level usually of 0.6 to 0.8 mmol/L, or 0.8 to 1.0 mmol/L for some people who have relapsed, as the specialist sets it¹⁶), which requires regular serum monitoring and kidney/thyroid checks every 3 to 6 months
Acute mania: Valproate sodium, faster onset than lithium; highly effective for mixed states; avoid in women of childbearing age (teratogen)
Acute mania: Atypical antipsychotics (quetiapine, olanzapine, risperidone, aripiprazole) used for acute stabilization; sedating effects useful for sleep disruption in mania
Bipolar depression: Lamotrigine, best evidence for preventing bipolar depressive episodes; requires slow titration to avoid Stevens-Johnson syndrome (rare but serious rash)
Bipolar depression: Lurasidone, FDA-approved specifically for bipolar I depression; metabolically cleaner than quetiapine
Bipolar depression: Caution with antidepressants. SSRIs and SNRIs alone (without a mood stabilizer) risk triggering mania, hypomania or rapid cycling. If used, must be paired with a mood stabilizer.
Psychotherapy: Cognitive Behavioral Therapy for Bipolar (CBT-BP), Interpersonal and Social Rhythm Therapy (IPSRT, specifically addresses circadian disruption), Family-Focused Therapy (FFT); all reduce relapse rates
Maintenance: Long-term mood stabilizer therapy is typically required; lithium maintenance has been associated with lower suicide rates in observational studies, though a recent analysis found adding lithium did not reduce suicide deaths

⚠️ Antidepressant caution: In bipolar disorder, antidepressants (SSRIs, SNRIs, tricyclics) prescribed without a mood stabilizer have a well-documented risk of triggering manic or hypomanic episodes and worsening rapid cycling. If you are taking antidepressants for depression and experience any elevated mood, decreased sleep need or increased impulsivity, consult your psychiatrist immediately; you may have undiagnosed bipolar disorder.

Nutritional Strategy

Diet for Bipolar Disorder

Diet does not treat bipolar disorder, but it matters: several of its medicines raise the risk of weight gain and diabetes¹⁹, and the NHS lists a healthy diet, a regular routine and limits on alcohol and caffeine among the things that help alongside treatment¹⁴.

Foods to favor, and the ones that work against them

What to eat or do	Details
✅ Foods to Favor:
Fatty Fish (3 to 4 servings/week)	Wild salmon, sardines, Atlantic mackerel, anchovies and herring are the highest dietary sources of EPA and DHA. These omega-⁠3s become part of nerve cell membranes over weeks; how they might act in bipolar disorder is not established.
Dark Leafy Greens & Colorful Vegetables	Spinach, kale and Swiss chard provide magnesium, folate and antioxidants essential for neurotransmitter synthesis and neuroprotection. Colorful and cruciferous vegetables (broccoli, Brussels sprouts) add fiber and antioxidants.
Berries & Polyphenol-Rich Foods	Blueberries, strawberries, dark cherries, pomegranate and dark cocoa provide polyphenols and fiber; their effect on mood in bipolar disorder has not been tested.
High-Quality Protein at Every Meal	Protein provides amino acid precursors for all neurotransmitters: tryptophan (→ serotonin → melatonin), tyrosine (→ dopamine → norepinephrine), glutamate (→ GABA). Regular meals also help keep the daily routine that treatment relies on¹⁴.
❌ Foods to Limit or Avoid, and One to Test For:
Alcohol (Complete Avoidance)	Alcohol is one of the most potent destabilizers in bipolar disorder, initially sedating but producing rebound excitatory states, disrupting circadian rhythms, depleting B vitamins, zinc and magnesium and impairing sleep. Alcohol use disorder is common in bipolar disorder and worsens its course. Complete avoidance is strongly recommended.
Refined Sugar & Ultra-Processed Foods	High glycemic load foods produce blood glucose spikes and dips and add calories with little nutrition. Ultra-processed and deep-fried foods are worth limiting for metabolic health, which medication often strains. In an umbrella review, more ultra-processed food was linked with about a 22% higher risk of depression²⁰.
Caffeine (Limit Strictly)	High caffeine intake disrupts sleep architecture, increases cortisol and can trigger hypomanic states or anxiety in bipolar patients, especially in the vulnerable prodromal period before a manic episode²¹. Limit to one cup of coffee before noon. Caffeine also increases lithium excretion, so cutting it suddenly can raise your lithium level. If you take lithium, cut down on caffeine gradually and tell your prescriber first, who may check your lithium level²¹.
Gluten (Test for Celiac Disease First)	Some studies report higher anti-gliadin antibodies in bipolar disorder; what this means is unclear, and celiac disease should be tested for before any gluten change. Any gluten trial belongs with your psychiatrist; mood improvement after removing gluten has not been shown in controlled trials.
If You Take Lithium:
Salt and Fluids (Keep Them Steady)	Dehydration and cutting down on salt both raise lithium levels, which can become dangerous¹⁷. Keep your salt and fluid intake steady, do not start a low-salt diet without your prescriber, and drink more in hot weather, during exercise or when you are ill.

Supplement Protocol

Evidence-Based Supplements for Bipolar Disorder

Evidence for these supplements in bipolar disorder ranges from promising but conflicting to none. All are adjunctive to psychiatric care.

Supplement	What it is for	Typical range	Timing	Notes & cautions
Omega-⁠3 (EPA + DHA)	The most evidence-supported nutritional intervention for bipolar depression. EPA is thought to be the more active fraction, though how omega-⁠3 might act in bipolar disorder is not established. A small 1999 trial of 30 patients found longer remission with omega-⁠3 added to usual treatment²²; reviews since describe the evidence as promising but conflicting. EPA-dominant formulas (EPA:DHA ≥ 2:1) are preferred.	Total EPA + DHA (EPA-dominant), amount set by your prescriber	With a meal	Refrigerate after opening and choose a product with third-party testing. If you take a blood thinner, tell the clinician who manages it before starting, as INR checks may be needed²³. In heart trials, fish oil supplements raised the risk of atrial fibrillation, an irregular heartbeat, more so at higher doses²⁴, so agree on the amount with your prescriber first.
N-Acetyl Cysteine (NAC)	NAC is a precursor of glutathione, an antioxidant. A 2008 double-blind placebo-controlled trial found improvements in depressive symptoms and functioning, lost after stopping, with no effect on time to a new mood episode¹⁸.	Amount set by your prescriber	Away from meals (empty stomach for best absorption); morning and evening	May cause mild GI discomfort initially; your prescriber can advise on starting. In the main trial, benefit on functioning appeared by 8 weeks and on depression at 20 weeks, and was lost after stopping¹⁸.
Magnesium Glycinate	Magnesium is the cofactor for over 300 enzymatic reactions including ATP production, glutamate-NMDA receptor gating, GABA synthesis and HPA axis regulation. Magnesium acts on NMDA receptors in laboratory work. Small open trials and case series have suggested a benefit, but controlled evidence is lacking.	Elemental magnesium (as glycinate), daily amount set by your prescriber	With dinner, or split between morning and evening	Avoid oxide (poorly absorbed, laxative) and citrate if stools are loose. Losing sleep with rising energy can be an early sign of mania: tell your prescriber rather than treating it with a supplement³.
Lithium Orotate (Not Recommended)	Lithium orotate is sold as a supplement but still contains lithium, a medicine with a narrow safe range, and it has no trial evidence in bipolar disorder. Claims that the orotate form crosses membranes better are not established.	Not recommended; never take it without your psychiatrist, who would set any amount	Not applicable	Not equivalent to prescription lithium carbonate (kept at blood levels usually of 0.6 to 0.8 mmol/L, or 0.8 to 1.0 mmol/L for some people who have relapsed¹⁶). Lithium orotate still contains lithium and adds to any prescribed dose. Must disclose use to psychiatrist; avoid concurrent use with NSAIDs (ibuprofen, naproxen), which reduce lithium clearance.
Methylfolate + Methylcobalamin	Common MTHFR gene variants can raise homocysteine slightly, but people who carry them still process folic acid normally, and their importance in bipolar disorder is uncertain. B12 as methylcobalamin supports the same methylation cycle as folate.	Methylfolate and B12 (methylcobalamin), amounts set by your prescriber	Morning with breakfast	If starting methylfolate causes anxiety, irritability or headache, tell your prescriber. Your prescriber may check folate, B12 and homocysteine first.
Vitamin D3 + K2	Vitamin D receptors are densely expressed in the limbic system, hippocampus, prefrontal cortex, amygdala and hypothalamus, the exact circuits dysregulated in bipolar disorder. Vitamin D activates transcription of BDNF, neuroprotective genes and anti-inflammatory cytokines. Whether low vitamin D affects the course of bipolar disorder is not established; a confirmed deficiency is worth correcting in its own right⁹. K2 (MK-⁠7) is involved in how the body uses calcium, though supplement benefits for bone and arteries are not established.	D3 + K2 (MK-⁠7) daily, amounts set by your prescriber	With the largest fat-containing meal of the day (fat-soluble vitamin)	Blood levels take 3 months to stabilize after dose change. Higher-body-weight individuals require higher doses (obesity sequesters vitamin D in adipose tissue). If you take warfarin, clear any vitamin K supplement with the clinician managing your anticoagulation before starting or stopping it: vitamin K antagonizes warfarin, and changing your intake destabilizes the INR. Consistency matters more than avoidance. This does not apply in the same way to direct oral anticoagulants such as apixaban or rivaroxaban, but tell your prescriber about any supplement you take.
Zinc Picolinate	Zinc modulates NMDA glutamate receptor activity (allosteric inhibitor, reduces excitotoxicity), regulates BDNF synthesis and serves as a cofactor for the conversion of tryptophan to serotonin and of dopamine precursors. Meta-analyses confirm significantly lower serum zinc in major depressive disorder, and emerging bipolar-specific data show similar depletion patterns in depressive phases. Evidence for zinc in bipolar disorder itself is limited.	Elemental zinc (as picolinate), daily amount set by your prescriber	With food (to prevent nausea)	Picolinate form is best absorbed. High-dose zinc taken long-term can deplete copper; ask your prescriber whether copper is needed. Do not take zinc within 2 hours of thyroid medication (interferes with absorption). Zinc and lithium compete for transport; monitor if on prescription lithium.

References & Evidence Notes

Each numbered entry below is either a source you can follow or a note setting out what the evidence does and does not support. Both are numbered together so the markers in the text line up.

Last reviewed October 20, 2026. Supplement entries are cross-checked against the NIH National Center for Complementary and Integrative Health and the Linus Pauling Institute Micronutrient Information Center.²⁷ Two warnings matter most. Never stop, reduce or change a mood stabilizer or antipsychotic without your prescriber: abrupt lithium discontinuation in particular causes rebound mania and raises suicide risk, and gradual, supervised change is a different thing from stopping. And antidepressants without a mood stabilizer can trigger mania or rapid cycling. That includes the herbal antidepressant St. John's wort, sold over the counter and frequently not mentioned to prescribers. Bipolar disorder carries the highest suicide risk of any psychiatric diagnosis; if you are having thoughts of harming yourself, contact emergency services or a crisis line now, which in the US is 988. Nutrition, sleep and routine genuinely support treatment. They are not treatment.

On how many people it affects: WHO estimates that 36 million people experienced bipolar disorder in 2023, including 3.3 million adolescents, and notes that people with bipolar disorder are at increased risk of suicide, WHO, mental disorders. ↩
On the diagnosis: bipolar I requires a manic episode, bipolar II a hypomanic episode with major depression. Depression dominates the symptomatic burden in both, which is why bipolar disorder is frequently misdiagnosed as unipolar depression for years, and why asking about past hypomania before starting an antidepressant matters. ↩
On sleep, which is not a lifestyle detail here. Sleep deprivation is a well-documented trigger for manic episodes, listed alongside stress and antidepressant medication as a precipitant, PubMed 26001664, and disrupted circadian rhythm both precedes and follows mood episodes. Regular sleep and wake times, and treating comorbid sleep disorders, are among the more effective non-pharmacological interventions available, and social rhythm therapy has trial support. ↩
On causes and treatment: NIMH guidance states that the exact cause of bipolar disorder is unknown, that it often runs in families through many genes, none of which causes it alone, and that brain structure and function may differ; that it usually requires lifelong treatment with mood stabilizers or atypical antipsychotics, sometimes after trying several; that antidepressants are not used alone because they can trigger mania or rapid cycling; that interpersonal and social rhythm therapy, family-focused therapy and CBT help alongside medication; and that no complementary approach is approved for treating it, NIMH, bipolar disorder. ↩
On antidepressants and St. John's wort. Antidepressant monotherapy can precipitate manic switch or rapid cycling in bipolar disorder, and guidelines advise against using them without a mood stabilizer. St. John's wort has antidepressant activity and has been associated with induction of mania, reported in an early series of three cases, PubMed 10653226, and again in a recent case of acute mania with psychosis, PubMed 41584739. It also induces cytochrome P450 3A4, reducing levels of many medicines including oral contraceptives and some antipsychotics; in healthy volunteers even the lowest dose tested almost doubled the clearance of a CYP3A probe drug, PubMed 39152679. It is sold without prescription and is routinely omitted from medication lists. ↩
On the course of bipolar II: in 86 people followed weekly for a mean of 13.4 years, symptoms were present in 53.9% of weeks, depressive symptoms in 50.3%, hypomanic symptoms in 1.3% and cycling or mixed symptoms in 2.3%, PubMed 12622659. ↩
On rapid cycling: a meta-analysis of 20 clinical studies found rapid cycling in 16.3% of 2,054 consecutively treated patients, slightly more often in women and in bipolar II, linked with hypothyroidism in studies of current rapid cycling, and preceded by antidepressant treatment in 46% of cases, though causal data were lacking, PubMed 14728111. ↩
On delayed diagnosis: a 2022 meta-analysis of studies of more than 40,000 people found a median delay of 6.7 years between the onset of bipolar disorder and its diagnosis (across 20 studies) and a median of 5.9 years before guideline-recommended treatment, PubMed 36018259. ↩
On omega-⁠3 and other adjuncts: omega-⁠3 fatty acids have modest evidence for bipolar depression and essentially none for mania, and N-acetylcysteine has mixed results after early promise; a systematic review of nutraceuticals in bipolar disorder found promising but conflicting evidence for both, too heterogeneous to pool, PubMed 32966097. Folate, B12 and vitamin D matter where deficient. All are adjuncts to pharmacological treatment, and none has evidence as monotherapy. ↩
On gut bacteria: a 2021 meta-analysis of 59 case-control studies found lower bacterial richness consistently only in bipolar disorder, and a shared pattern across depression, bipolar disorder, schizophrenia and anxiety of fewer anti-inflammatory butyrate-producing bacteria, with little that was specific to any one diagnosis, PubMed 34524405. ↩
On how common it is: in a US national survey, an estimated 4.4% of adults had bipolar disorder at some point in their lives and 2.8% in the past year, and 82.9% of those affected had serious impairment, the highest share among mood disorders, NIMH, bipolar disorder statistics. ↩
On suicide risk: a 2020 review states that bipolar disorder has the highest suicide rate of all psychiatric conditions, about 20 to 30 times that of the general population, that suicide is associated with depressed or mixed states rather than mania, and that early treatment with close follow-up is the best way to lower the risk, PubMed 31955273. ↩
On crisis help in the US: NIMH advises anyone struggling or having thoughts of suicide to call or text the 988 Suicide and Crisis Lifeline at 988 or chat at 988lifeline.org, and to call 911 in life-threatening situations, NIMH, bipolar disorder. ↩
On triggers and self-care: NHS guidance lists a parent or sibling with bipolar disorder, childhood trauma or abuse, stressful events and recreational drugs such as cannabis or cocaine among the things that raise the chance of having it, names stress, too little sleep and being too busy as triggers, advises a regular routine, plenty of sleep, a healthy diet and exercise, and avoiding recreational drugs, too much alcohol, lots of caffeinated drinks, shift work and night flights across time zones, and says not to stop bipolar medicine unless a doctor says so, even when you feel better, NHS, bipolar disorder. ↩
On inflammation: a meta-analysis of 30 studies with 1,351 people with bipolar disorder and 1,248 controls found several pro-inflammatory, anti-inflammatory and regulatory cytokines raised in bipolar disorder, some varying with the phase of illness; it does not show that inflammation causes episodes, PubMed 23419545. ↩
On lithium blood levels and tests: UK guidance advises aiming for a lithium level of 0.6 to 0.8 mmol per liter in people starting lithium for the first time, and considering 0.8 to 1.0 mmol per liter for at least 6 months in people who have relapsed on lithium before or still have symptoms that affect their functioning; measuring the level 1 week after starting and 1 week after every dose change, weekly until stable, then every 3 months for the first year; advising people on lithium to seek medical attention if they develop diarrhea or vomiting or become acutely ill, and to keep up their fluids after sweating; warning them not to take over-the-counter anti-inflammatory painkillers; and, if lithium is stopped, reducing it gradually over at least 4 weeks with close watch for early signs of mania and depression, NICE CG185. ↩
On lithium. Lithium remains the best-evidenced mood stabilizer, and nothing in this note is a reason to change how you take it. Its anti-suicidal effect, though, is less settled than it once looked. A 2026 study emulating a randomized trial in US veterans found that adding lithium to existing treatment did not reduce suicide death over ten years, a risk ratio of 1.00 with a confidence interval of 0.86 to 1.15, agreeing with an earlier randomized trial, PubMed 42551960. That question is only about ADDING lithium in order to lower suicide risk. It says nothing about continuing it, and stopping lithium carries the rebound risk described at the end of this note. Lithium requires monitoring of serum levels, kidney and thyroid function, and a 2026 review sets out the renal problems that make that monitoring necessary and how care is shared between psychiatry and nephrology when kidney function declines, PubMed 42589388. Its therapeutic window is narrow, and levels rise dangerously with dehydration, sodium restriction, NSAIDs, ACE inhibitors and thiazide diuretics. Sudden discontinuation is associated with rebound mania and increased suicide risk, so any change is planned and gradual. ↩
On N-acetylcysteine: in a 24-⁠week randomized placebo-controlled trial of 75 people with bipolar disorder in the maintenance phase, adding NAC to usual treatment improved depressive symptoms. Benefit on functioning was evident by 8 weeks and on the main depression scale at 20 weeks, the gains were lost after a 4-⁠week washout, and NAC did not change the time to a new mood episode, PubMed 18534556. ↩
On metabolic monitoring: several mood stabilizers and antipsychotics cause weight gain, dyslipidemia and diabetes, and cardiovascular disease is a leading cause of premature death in bipolar disorder: a European multi-country cohort found it carried the highest absolute excess mortality in bipolar disorder, at 8.4 excess deaths per 10,000 person-years, PubMed 42480565. This is where nutrition does its most concrete work, alongside regular metabolic monitoring, rather than as an alternative to the medicines causing the effect. ↩
On ultra-processed food: an umbrella review of meta-analyses covering nearly 10 million people found greater ultra-processed food intake associated with about a 22% higher risk of depressive outcomes, from observational studies of low certainty, PubMed 38418082. ↩
On caffeine and alcohol: caffeine disrupts sleep architecture and can destabilize mood, and it also raises renal lithium clearance, so that stopping it abruptly can raise serum lithium; two reported cases developed worsening lithium tremor after cutting out coffee, PubMed 3338980. Alcohol worsens the course and interacts with treatment. Consistency matters as much as quantity. ↩
Stoll AL, Severus WE, Freeman MP, Rueter S, Zboyan HA, Diamond E, Cress KK, Marangell LB. Omega 3 fatty acids in bipolar disorder: a preliminary double-blind, placebo-controlled trial. Arch Gen Psychiatry. 1999;56(5):407-⁠412. PubMed 10232294. In this 4-⁠month trial in 30 people with bipolar disorder, those given omega-⁠3 fatty acids alongside their usual treatment stayed in remission significantly longer than those given placebo; the authors called it a preliminary study. ↩
On fish oil and blood thinners: the US Office of Dietary Supplements notes that fish oil might prolong clotting times in people taking an anticoagulant, although most research finds no significant effect, and that product labeling advises periodic INR monitoring for people taking omega-⁠3 products with anticoagulants, NIH ODS, omega-⁠3 fatty acids. ↩
Gencer B, Djousse L, Al-Ramady OT, Cook NR, Manson JE, Albert CM. Effect of long-term marine omega-⁠3 fatty acids supplementation on the risk of atrial fibrillation in randomized controlled trials of cardiovascular outcomes: a systematic review and meta-analysis. Circulation. 2021;144(25):1981-⁠1990. PubMed 34612056. Seven trials with 81,210 people followed for about 5 years: omega-⁠3 supplements were linked to a higher risk of atrial fibrillation (hazard ratio 1.25), more so in the trials giving higher doses (hazard ratio 1.49), and the risk rose with the dose. ↩
On urgent help in the UK: NHS guidance advises calling emergency services or going to an emergency department if someone's life is at risk or you do not feel you can keep yourself or someone else safe, calling 111 for urgent mental health help, and Samaritans on 116 123 at any hour, NHS, urgent help for mental health, NHS, help for suicidal thoughts. ↩
On lithium toxicity: NHS guidance lists stomach ache, nausea and diarrhea, blurred vision, strong thirst, drowsiness, confusion and blackouts, shaking, muscle weakness and difficulty speaking as signs of lithium toxicity, which is an emergency, and MedlinePlus lists shaking you cannot control, muscle weakness, loss of coordination, diarrhea, vomiting and slurred speech among the symptoms to act on at once. Levels can rise with dehydration, a sudden cut in salt and some other medicines, NHS, side effects of lithium, MedlinePlus, lithium. ↩
National Center for Complementary and Integrative Health (NIH), nccih.nih.gov, and the Linus Pauling Institute Micronutrient Information Center, lpi.oregonstate.edu/mic. ↩

Cause	How It Contributes to Bipolar Disorder	What Helps
Genes and family history	It often runs in families, mostly through many genes acting together; a parent or sibling with it raises the chance, but many people with a family history never develop it⁴	Tell your clinician about family history and any past highs, especially before an antidepressant is considered²
Brain structure and function	Brain structure and function differ on average from people without the condition⁴	Prescribed treatment: mood stabilizers can prevent episodes or make them less severe⁴
Stress, trauma and loss	Childhood trauma or abuse and stressful events such as a bereavement, relationship or money problems raise the chance of developing it, and stress can trigger episodes¹⁴	Talking therapy alongside medicine, such as family-focused therapy or CBT⁴, and managing stress where you can¹⁴
Lost sleep and broken routine	Sleep deprivation is a documented trigger for mania, alongside stress and antidepressants³; shift work, very long hours and night flights across time zones are best avoided¹⁴	Regular sleep and wake times and a daily routine¹⁴; interpersonal and social rhythm therapy works on these rhythms⁴
Alcohol and recreational drugs	Recreational drugs, cannabis among them, raise the chance of developing it, and the NHS advises against them and against drinking too much alcohol¹⁴	The diet section's advice on alcohol and caffeine; help for alcohol or drug use as part of treatment
An antidepressant alone, or St. John's wort	An antidepressant taken without a mood stabilizer can trigger mania or rapid cycling⁴; the herbal antidepressant St. John's wort has been linked with mania⁵	Antidepressants only alongside a mood stabilizer, as your psychiatrist plans; no St. John's wort
Inflammation and gut bacteria (under study)	A meta-analysis of 30 studies found several inflammatory markers raised in bipolar disorder¹⁵, and gut bacteria differ from controls in a pattern shared with depression and schizophrenia¹⁰; neither is shown to cause episodes	No diet or supplement on this page has been shown to prevent episodes this way; a varied, fiber-rich diet supports general health

Test	What it shows
Clinical Assessment Tools
Mood Charting (Daily Mood Log)	The most critical self-monitoring tool. Daily tracking of mood (-⁠3 to +3 scale), sleep hours, energy level, medications, menstrual cycle, alcohol/substance use and significant life events over months reveals mood patterns, cycle frequency, triggers and early warning signs of emerging episodes. The NIMH Life Chart Method and mood-tracking apps make this accessible.
MDQ & YMRS Screening	The Mood Disorder Questionnaire (MDQ) is a validated 13-⁠item self-report screen for bipolar spectrum disorders, sensitivity 73%, specificity 90% for bipolar I. The Young Mania Rating Scale (YMRS) quantifies manic symptom severity across 11 items. The PHQ-⁠9 assesses depressive severity. These structured tools supplement clinical interview; bipolar is frequently misdiagnosed as unipolar depression when the hypomanic history is missed.
Neuropsychological Assessment	Formal cognitive testing (THINC-it, MATRICS) measures executive function, working memory, processing speed and verbal learning, all commonly impaired in bipolar disorder even during euthymia. A baseline lets changes be tracked over time.
Functional & Nutritional Lab Panel
Omega-⁠3 Index	The Omega-⁠3 Index (EPA + DHA as % of RBC fatty acids) measures omega-⁠3 status. It is not part of routine bipolar care, and no level has been shown to change the course of the illness.
Inflammatory & Nutritional Markers	High-sensitivity CRP (hs-CRP), IL-⁠6, homocysteine, Vitamin D 25-⁠OH-D where deficiency is suspected, RBC magnesium (serum magnesium misses intracellular depletion), serum zinc, plasma folate + active B12 and ferritin. Correcting a confirmed deficiency is worthwhile in its own right.
Thyroid Panel & Lithium Levels	Full thyroid panel (TSH, Free T3, Free T4, anti-TPO antibodies): thyroid problems can mimic mood symptoms and have been linked with rapid cycling⁷. Lithium therapy (when used) requires regular serum lithium monitoring (usually 0.6 to 0.8 mmol/L, or 0.8 to 1.0 mmol/L for some people who have relapsed, as the specialist sets it¹⁶¹⁷) plus kidney function (creatinine, eGFR) and calcium levels. Subclinical hypothyroidism from lithium use must be identified and treated.

Bipolar Disorder

What Is Bipolar Disorder?

Types of Bipolar Disorder

⚡ Bipolar I

🌊 Bipolar II

🌦️ Cyclothymia & Rapid Cycling