Definition

What Is Low Blood Pressure?

Low blood pressure (hypotension) is defined as a blood pressure reading consistently below 90/60 mmHg. While some people naturally run low without symptoms, pathological hypotension causes significant impairment to quality of life and organ perfusion.

Blood pressure is maintained by a complex interplay of cardiac output, vascular resistance, blood volume and neurological regulation. When any of these systems falters, due to dehydration, adrenal insufficiency, nutritional deficiencies or autonomic dysfunction, the body's ability to maintain adequate perfusion pressure is compromised.

The brain is particularly vulnerable: even a brief drop in cerebral perfusion pressure causes the characteristic dizziness, "graying out" and fainting episodes that define symptomatic hypotension.

⚠️ Orthostatic hypotension, a drop of 20+ mmHg systolic when standing, affects about 1 in 5 adults over 60 living in the community and is linked to more falls and to higher rates of cardiovascular illness and death¹.

Low blood pressure, below 90/60 mmHg: a standing figure with pale vessels in the head and wide, dark veins in the legs, labeled less blood to the brain, dizzy when standing up and blood pools in the legs

💡 Key Insight

Low blood pressure is often a symptom of an underlying issue, not a standalone condition. Identifying the cause, whether medication, dehydration, autonomic, cardiac or hormonal, determines the correct treatment approach.

Types of Hypotension

🧍 Orthostatic (Postural)

BP drops 20+ mmHg systolic within 3 minutes of standing. The most common type. Caused by failure of the cardiovascular reflex to compensate for gravity-driven blood pooling in the legs. Common in dehydration, prolonged bed rest, autonomic neuropathy (diabetic), medications² and adrenal insufficiency.

🍽️ Postprandial

BP drops 20+ mmHg 30 to 75 minutes after eating. Blood diverts to the gut for digestion, overwhelming the body's compensatory mechanisms. Common in older adults, Parkinson's disease and autonomic dysfunction. Often confused with "food coma" but can be clinically significant, especially for falls.

🧠 Neurally Mediated (NMH)

A miscommunication between heart and brain triggers a paradoxical vasodilation and bradycardia response to prolonged standing. Common in young adults and those with POTS (Postural Orthostatic Tachycardia Syndrome)³. Often triggered by heat, stress or standing in crowded spaces.

Causes

Causes of Low Blood Pressure

Low blood pressure is usually a sign of something else rather than a condition in its own right; symptoms that are new, or that come with fainting, falls or confusion, need a clinician rather than a saltshaker¹⁰.

Cause	How It Contributes to Low Blood Pressure	What Helps
Medicines	The NHS lists some medicines among the causes of low blood pressure, and names changing a medicine or altering its dose as a treatment when that is the cause¹⁰; a medication review is one of the fundamental first-line measures in orthostatic hypotension⁸	A medication review with your prescriber before anything else on this page, including before adding salt or fluid; never stop or change a prescribed medicine on your own
Dehydration and fluid loss	Losing more fluid than you take in causes lightheadedness and dizziness, and the NHS lists vomiting or diarrhea, heat, too much alcohol, heavy sweating and a high temperature among the causes¹¹	The fluid and electrolyte advice in the diet section, scoped to people with symptomatic low blood pressure, and treating the cause of the fluid loss; get urgent advice if you cannot keep fluids down
Age, and damage to the nerves that control blood pressure	Orthostatic hypotension becomes more common with age, and the groups worth testing even without symptoms include adults over 70 with frailty, people with neurodegenerative or autonomic disorders, and anyone with unexplained falls⁸; the NHS adds getting older, and conditions such as diabetes¹⁰	The standing blood pressure measurements and blood tests in the diagnosis section, plus compression garments, rising in stages and raising the head of the bed as the treatment section describes
Eating a meal	Blood diverts to the gut after eating and the pressure can fall with it; anyone with orthostatic hypotension should also be checked for postprandial hypotension⁸	Small, frequent meals rather than two or three large ones, as the diet section sets out, and sitting still or lying down for a while after eating¹⁰
Adrenal insufficiency	Feeling dizzy or lightheaded on standing is one of the listed symptoms, alongside extreme tiredness, darker patches of skin, weight loss, salt cravings and muscle weakness; it is confirmed with a blood test before and after a stimulation injection¹²	Testing rather than assuming, as the diagnosis section says. If the test is positive the treatment is prescribed hormone replacement taken daily; no supplement on this page substitutes for it
Pregnancy, and readings that are simply low for you	The NHS lists being pregnant among the causes, and notes that a reading may be low because someone is fit and healthy, or inherited from a parent¹⁰	Nothing, if there are no symptoms: low readings without symptoms do not need treating. Get checked if symptoms are new, or if you faint, fall or become confused

Diagnosis

How Low Blood Pressure Is Diagnosed

Identifying the type of hypotension and what is causing it requires more than a single blood pressure reading; it takes readings in more than one position and tests for the common causes.

Test	What it shows
At-Home Assessment
Orthostatic BP Test	Using a home blood pressure cuff, with someone else present: measure BP after lying flat for 5 minutes, then immediately upon standing, then at 1 minute and 3 minutes standing. Sit or lie down at once if you feel faint. A drop of ≥20 mmHg systolic or ≥10 mmHg diastolic suggests orthostatic hypotension. Keep a log over 3 to 5 days for patterns and take it to your clinician.
Hydration Status Check	Dark urine (darker than pale yellow), infrequent urination or persistent thirst suggests dehydration as a driver. Track daily fluid intake and note whether symptoms improve with increased water and electrolyte consumption.
Symptom Diary	Log episodes of dizziness, pre-syncope, fatigue and palpitations alongside time of day, meals, activity, temperature and fluid intake. Patterns reveal whether the trigger is postural, postprandial, thermal or metabolic.
Clinical Tests
Tilt Table Test	The gold standard for diagnosing neurally mediated hypotension and POTS. Patient is strapped to a motorized table that tilts from horizontal to 70° while continuous BP and heart rate are monitored. Reproduces and characterizes syncope episodes in a controlled clinical setting.
Adrenal & Hormonal Panel	Morning cortisol (8 AM draw), DHEA-S, aldosterone and renin levels assess adrenal function. Low aldosterone reduces sodium retention and blood volume, a key reversible cause of hypotension. Adrenal insufficiency is confirmed with a morning cortisol and an ACTH stimulation (cosyntropin) test.
Comprehensive Blood Panel	CBC (anemia check), BMP (electrolytes, kidney function), thyroid panel (hypothyroidism lowers BP), B12 and folate (neurological function), ferritin (iron deficiency can worsen symptoms on standing) and HbA1c (diabetic autonomic neuropathy).
Holter Monitor & Echocardiogram	Rules out structural cardiac causes (valve disease, cardiomyopathy, heart failure) and rhythm disturbances that reduce cardiac output. Important when hypotension is severe or does not respond to fluid and electrolyte correction (chest pain with low blood pressure is an emergency).

Treatment Comparison

Conventional and Holistic Treatment for Low Blood Pressure

🌿 HOLISTIC

💊 CONVENTIONAL

🌿

Holistic / Functional Approach

Hydration, electrolytes, dietary sodium, physical measures and testing for an underlying cause

Primary Strategy

Correct dehydration, optimize electrolytes, increase dietary sodium where appropriate and test for adrenal insufficiency rather than assuming it: if cortisol is genuinely low that is a diagnosis needing hormone replacement, not a supplement¹³

Key Herbs

Licorice root, only under a clinician's supervision. Not shown to help low blood pressure: ashwagandha and rhodiola, which the supplement table below lists for stress and energy

Timeline

Drinking about 2 cups (500 mL) of water raises blood pressure within 20 to 30 minutes; how much lasting benefit fluid and salt measures bring varies.¹⁴

Side Effects

Licorice root raises BP through an aldosterone-like effect; monitor if used long-term¹⁵

Full Holistic Approach Includes

Increase fluid intake to about 10 to 15 cups (2.5 to 3.5 L) a day¹⁴ with added electrolytes (sodium, potassium, magnesium), only if you have no heart failure or kidney disease and your clinician agrees
Liberal sodium (3,000 to 5,000 mg/day) draws water into the vascular space and is standard advice for orthostatic hypotension and POTS. This is the opposite of the advice in the High Blood Pressure and Stomach Cancer guides, because here the aim is to raise blood pressure. It applies only to people with confirmed symptomatic hypotension and no heart failure, kidney disease or high blood pressure. Agree on it with your clinician first.¹⁶
Whole licorice root, not DGL. Glycyrrhizin inhibits cortisol breakdown, producing an aldosterone-like effect that raises blood pressure. Deglycyrrhizinated licorice (DGL) has that compound removed and will not raise blood pressure. Whole licorice also lowers potassium and can cause arrhythmias, so it needs a clinician's supervision and potassium monitoring, not self-dosing.¹⁵
Compression stockings to reduce venous pooling in the lower extremities
Small, frequent meals to prevent postprandial BP drops
Head-of-bed elevation (10 to 20°) to activate renin-angiotensin system during sleep
Caffeine in moderation, temporarily increases BP; use strategically in the morning
B12 if a blood test shows a deficiency. CoQ10 is not shown to help low blood pressure and might lower it slightly (see the supplement table)

⚠️ Important: Whole licorice root (not DGL) raises blood pressure via mineralocorticoid effect. Use under supervision and monitor BP weekly. DGL form is safe but does not raise BP.

Nutritional Strategy

Diet for Low Blood Pressure

After a medication review, fluid, salt and meal timing are the main everyday tools for managing symptomatic hypotension.

What to eat more of for low blood pressure, and what to reduce

What to eat or do	Details
✅ Eat More Of:
High-Sodium Foods (Strategic)	Sea salt, olives, pickles, miso soup, anchovies, canned sardines. Sodium retains water in the vascular compartment, increasing blood volume and pressure. Aim for 3,000 to 5,000 mg/day only if you have confirmed symptomatic low blood pressure and no heart failure, kidney disease or high blood pressure, and agree on it with your clinician first¹⁶.
Electrolyte-Rich Foods	Coconut water, bone broth, bananas, avocado, leafy greens, sweet potato. Balanced electrolytes (sodium, potassium, magnesium) optimize fluid regulation and prevent osmotic imbalances that worsen hypotension.
Iron & B12 Sources	Grass-fed red meat, organ meats (liver), shellfish, dark leafy greens. If you are pregnant, avoid liver and liver products: they are very high in vitamin A. Iron-deficiency anemia and B12 deficiency are significant and reversible causes of hypotension: both reduce oxygen-carrying capacity and autonomic nerve function.
Moderate Caffeine	1 to 2 cups of coffee or green tea in the morning can temporarily raise blood pressure and improve alertness in hypotensive patients. Use strategically, not in the evening when orthostatic symptoms are typically less severe.
❌ Avoid or Reduce:
Alcohol	A potent vasodilator, alcohol lowers blood pressure by relaxing arterial walls and causing fluid loss through increased urination. Even moderate alcohol consumption can trigger symptomatic episodes in hypotensive individuals.
Large Meals	Large carbohydrate-heavy meals trigger postprandial hypotension by diverting significant blood volume to the gut. Switch to 5 to 6 small meals instead of 2 to 3 large ones to prevent post-meal crashes.
Hot Foods & Beverages	Hot soups, stews and beverages cause peripheral vasodilation, temporarily lowering BP. Hot showers and baths have the same effect. Lukewarm is preferable when symptomatic.
Refined Carbohydrates & Sugars	Rapid blood sugar spikes followed by crashes can trigger reactive hypoglycemia, which compounds and mimics hypotension symptoms. A low-glycemic diet with protein and fat at every meal stabilizes both blood sugar and blood pressure.

Supplement Protocol

Evidence-Based Supplements for Low Blood Pressure

Supplements can correct a confirmed deficiency such as iron or B12; adrenal insufficiency needs hormone replacement, not a supplement.

Supplement	What it is for	Typical range	Timing	Notes & cautions
Licorice Root (Whole)	Contains glycyrrhizin, which inhibits the enzyme that breaks down cortisol, effectively prolonging its mineralocorticoid action, increasing sodium and water retention, raising blood volume and pressure. It raises blood pressure reliably enough that it needs supervision and potassium monitoring.	600 to 1,200 mg/day (standardized extract)	Morning with breakfast	Do not use the DGL form: glycyrrhizin is removed in DGL. Monitor BP weekly, and potassium as your clinician advises. Avoid with high blood pressure, pregnancy, heart failure or edema, kidney disease, low potassium, heart rhythm problems or diuretic use.
Electrolyte Complex (Na, K, Mg)	Replaces the three key osmotic regulators of blood volume. Sodium retains water intravascularly; potassium and magnesium support vascular tone and cardiac rhythm. Essential when hypotension is driven by dehydration, excessive sweating or diuretic use.	1 to 2 servings/day	Morning + post-exercise or in hot weather	Choose a formula with sodium chloride, potassium citrate and magnesium glycinate. Avoid added potassium with kidney disease or if you take an ACE inhibitor, ARB or potassium-sparing diuretic, unless your clinician agrees. Avoid sweetened sports drinks with high sugar.
Ashwagandha	Not shown to help low blood pressure. Adaptogenic herb studied for stress and sleep; no evidence that it raises blood pressure. Low cortisol needs medical testing and treatment, not an herb.	300 to 600 mg/day	Morning with food	Use a standardized extract. Rare liver injury has been reported. Avoid it in pregnancy, while breastfeeding and with a thyroid or autoimmune disorder, and check with your prescriber first if you take medicines for blood pressure, diabetes, seizures or thyroid disease, an immunosuppressant or a sedative¹⁷.
Rhodiola Rosea	Stimulating adaptogen that enhances sympathetic nervous system tone and energy production. It is promoted for energy, stress and athletic performance, and it is not a treatment for low blood pressure itself¹⁸.	200 to 400 mg/day	Morning, before meals	Mildly stimulating; avoid in the evening. Use in the first half of the day only. Interactions with a blood-pressure medicine have been reported, and little is known about its safety in pregnancy or breastfeeding, so check with your prescriber first¹⁸.
Vitamin B12	B12 deficiency causes autonomic neuropathy, disrupting the nerve signals that regulate vascular tone and orthostatic response. B12 directly supports myelin sheath integrity of autonomic nerve fibers. A frequently missed reversible cause of orthostatic hypotension.	1,000 to 5,000 mcg/day (sublingual or injected)	Morning, fasted	High-dose oral or sublingual B12 can be absorbed without intrinsic factor; injections are used when deficiency is severe. Blood test baseline before supplementing.
Iron Bisglycinate + Vitamin C	Iron-deficiency anemia reduces blood viscosity and oxygen-carrying capacity, directly contributing to hypotension and orthostatic symptoms. Vitamin C enhances non-heme iron absorption by up to 3-⁠fold.	Iron: 18 to 36 mg/day; Vitamin C: 500 mg alongside	Between meals (better absorption away from food)	Confirm iron deficiency with ferritin, serum iron and TIBC before supplementing. Iron bisglycinate causes less GI upset than ferrous sulfate. Stay within the 45 mg/day tolerable upper intake level unless a clinician is correcting a confirmed deficiency. Test ferritin first, and retest rather than staying on it indefinitely.
CoQ10 (Ubiquinol)	Mitochondrial cofactor that supports cardiac output and overall cellular energy production. Low CoQ10 is linked to reduced heart rate variability and autonomic tone, both of which impair the body's ability to compensate for postural changes in blood pressure.	100 to 200 mg/day (ubiquinol form)	With a fat-containing meal	Not shown to help low blood pressure, and CoQ10 might lower blood pressure slightly²², so agree on it with your clinician first. Ubiquinol is the reduced, active form, better absorbed than ubiquinone, especially over age 40.
Folate	Required for nitric oxide regulation and healthy endothelial function. Folate deficiency, like B12 deficiency, contributes to autonomic dysfunction and anemia. Folic acid and methylfolate both correct folate deficiency.	400 to 800 mcg/day (as folic acid or 5-⁠MTHF)	Morning with food	Particularly important when B12 is also being supplemented; they work synergistically.
Salt Tablets (Sodium Chloride)	For severe or drug-resistant orthostatic hypotension, pharmaceutical-grade sodium chloride tablets provide a controlled, measured dose of sodium to increase intravascular volume and reduce orthostatic BP drop. More reliable than dietary salt alone in severe cases.	0.5 to 1 g tablets, 1 to 3x/day	With meals and fluids	Used under medical supervision. Monitor for edema or cardiac strain. Most effective when combined with compression stockings¹⁹ and adequate fluid intake.

What to Expect

What to Expect Over Time

What happens depends on why the pressure is low.

Treatment and supportive care, together

First Weeks

Some presentations are emergencies, not for home treatment with fluid and salt; see When to Seek Care²⁰. Otherwise, start with a medication review with your prescriber⁸. Getting up slowly, small frequent meals and more water start at once¹⁰.

Months 1 to 3

Find the cause (see Diagnosis). If a stimulation test shows adrenal insufficiency, treatment is prescribed daily hormone replacement, not a supplement¹². The extra salt and fluid in this guide apply only to people with confirmed symptomatic hypotension and no heart failure, kidney disease or high blood pressure, and need your clinician's agreement first.

Months 3 to 12

If symptoms continue, prescribed medicine is added to the nonpharmacological measures; the target is symptom relief and fall prevention, not a reading⁸.

Long Term

Orthostatic hypotension becomes more common with age and is linked to falls and higher mortality, so it needs rechecking⁸. Repeat the medication review whenever a prescription changes.

When to Seek Care

Call 911 or go to the emergency department if someone has passed out and is not responding normally, for severe difficulty breathing, for lips or skin turning pale, blue or gray, or for chest pain that feels tight or spreads to the arms, neck or jaw²⁰. Sudden low blood pressure with new confusion or fainting is an emergency too: call 911 or go to the emergency department. See a doctor if you keep getting lightheadedness or dizziness, nausea, blurred vision, general weakness, confusion or fainting. See a doctor promptly if lightheadedness, dizziness, nausea, blurred vision or weakness is new, if you have fallen or if the symptoms started after a medicine changed¹⁰.

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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.²¹ This page is nutrition education, not medical advice. Low blood pressure is a finding, not a diagnosis, and the important question is always what is causing it. Most of it is benign. Some of it is not: sudden hypotension can signal internal bleeding, sepsis, a cardiac event or adrenal crisis, and that is an emergency rather than something to manage with fluids and salt. Two specific cautions on this page. The sodium advice here is the opposite of the advice in the High Blood Pressure guide, and it is meant only for people with confirmed symptomatic hypotension. And if low cortisol is found, that is adrenal insufficiency, which is a diagnosis requiring hormone replacement and can be fatal untreated. It is not something to support with herbs.

On orthostatic hypotension: a 2017 clinical review defines it as a sustained fall of at least 20 mmHg systolic or 10 mmHg diastolic within three minutes of standing, describes it as common, particularly in older people, and linked to cardiovascular and cerebrovascular illness and death, notes that its symptoms on standing predispose to fainting and falls, and advises documenting medicines that may be causing it once it is found, PubMed 28807522. A 2020 meta-analysis of 20 studies with 24,967 adults over 60 living in the community found it in 22.2%, about one in five, PubMed 30169579. A 2026 review names medication review among the first-line measures, PubMed 41941194. ↩
On medications that cause or worsen hypotension: antihypertensives, diuretics, alpha-blockers, nitrates, tricyclic antidepressants, some antipsychotics and dopamine agonists. Reviewing these with a prescriber resolves a substantial share of orthostatic symptoms and should precede supplementation. ↩
On postural orthostatic tachycardia syndrome (POTS): a sustained heart rate rise of at least 30 bpm on standing (40 bpm in adolescents) without orthostatic hypotension. Management overlaps with the advice here, particularly fluid and salt loading, compression and graded recumbent exercise, but POTS is a distinct condition and benefits from specialist input. ↩
On fainting in US emergency departments: an analysis of the CDC's National Hospital Ambulatory Medical Care Survey for 2008 to 2017 found over 15 million emergency department visits for syncope, which made up a large and growing share of visits, PubMed 33617687. ↩
On common causes: MedlinePlus lists not drinking enough fluids, certain medicines, including diuretics, heart medicines, painkillers and some antidepressants, and sudden blood loss, which can cause shock, a medical emergency, among the causes of low blood pressure. It says a provider will examine you to find the cause, and advises calling a provider right away for fainting, dizziness, chest pain or an irregular heartbeat, MedlinePlus, low blood pressure. ↩
On orthostatic hypotension and falls: a 2019 systematic review and meta-analysis of 50 studies with 49,164 older adults found orthostatic hypotension linked to falls with an odds ratio of 1.73, a result that held across study design, quality and the definition used, PubMed 30583909. ↩
On water and blood pressure: a study of 47 people with severe autonomic failure and 19 controls found that drinking water raised systolic pressure by about 33 to 37 mmHg in the patients and by about 11 mmHg in older controls, peaking 30 to 35 minutes after drinking, with no change in young controls. The effect works through a rise in sympathetic activity, not through blood volume, which did not change, PubMed 10662747. ↩
On what comes first: a 2026 clinical review of orthostatic hypotension states that nonpharmacological measures (medication review, increased salt and fluid intake, compression garments and behavioral change) are first line, that anyone with orthostatic symptoms should be tested along with adults over 70 with frailty, people with neurodegenerative or autonomic disorders and anyone with unexplained falls, that orthostatic hypotension should prompt a check for postprandial hypotension and supine hypertension, and that the treatment target is symptom relief and fall prevention rather than a blood pressure number, PubMed 41941194. ↩
On how common fainting is in emergency care: a 2022 prospective study across 41 emergency departments in 14 European countries enrolled 952 adults with a transient loss of consciousness out of 98,301 presentations over two weeks, a prevalence of about 1%, and 4 in 10 of them were admitted to the hospital, PubMed 38015745. ↩
On causes and on when to get checked: NHS guidance defines low blood pressure as a reading below 90/60 mmHg, lists lightheadedness or dizziness, nausea, blurred vision, general weakness, confusion and fainting as reasons to get blood pressure checked, and names pregnancy, some medical conditions such as diabetes, some medicines and getting older among the causes, noting that a reading may also be low simply because someone is fit and healthy or inherited it. It advises getting up slowly, small frequent meals, more water, support stockings and a change of medicine or dose where a medicine is the cause, and notes that medicine to raise blood pressure is rarely needed, NHS, low blood pressure. ↩
On fluid loss: NHS guidance lists feeling thirsty, headache, lightheadedness, dizziness, dark strong-smelling urine, passing urine less often, tiredness and a dry mouth as signs of dehydration, and vomiting or diarrhea, heat, too much alcohol, heavy sweating, a high temperature and diabetes among the things that bring it on, NHS, dehydration. ↩
On Addison's disease symptoms and treatment: NHS guidance lists feeling dizzy or lightheaded when standing up among the symptoms of Addison's disease, alongside extreme tiredness, darker patches of skin, loss of appetite, weight loss, salt cravings, muscle weakness and cramps. It is confirmed by a specialist with blood tests before and after a stimulation injection, and the treatment is steroid medicine to replace the missing hormones, usually taken every day for life, NHS, Addison's disease. ↩
On adrenal insufficiency, which is the reason this page says test rather than support. Primary adrenal insufficiency (Addison's disease) presents with fatigue, weight loss, hyperpigmentation and postural hypotension, and is diagnosed with a morning cortisol and an ACTH stimulation (cosyntropin) test, not with a symptom questionnaire. Treatment is hydrocortisone replacement. Untreated, it can progress to adrenal crisis, which is fatal without prompt intravenous steroids and fluids. "Adrenal fatigue" as a distinct entity is not recognized by endocrinology societies, and a systematic review of the studies behind the idea found no substantiation for it as a medical condition, PubMed 27557747; genuine adrenal insufficiency is, and the distinction matters because one needs a prescription. ↩
On hydration: the 2.5 to 3.5 L/day figure on this page applies to symptomatic hypotension and is higher than general guidance. Rapid ingestion of around 500 mL of water produces a measurable pressor response within 20 to 30 minutes, which is useful before situations that provoke symptoms. ↩
On licorice, and why this page specifies whole root rather than DGL. Glycyrrhizin inhibits 11-⁠beta-hydroxysteroid dehydrogenase type 2, so cortisol is not converted to cortisone in the kidney and acts on the mineralocorticoid receptor, producing sodium retention, potassium loss and a rise in blood pressure. Deglycyrrhizinated licorice has that compound removed and does not do this, which is precisely why DGL is the form used for reflux and ulcer symptoms elsewhere on this site. The same mechanism that makes whole licorice useful here makes it risky: sustained intake causes hypokalemia and hypertension, PubMed 42292819, and reported cases include long QT progressing to malignant arrhythmia, PubMed 31829973, and torsade de pointes, PubMed 39010227. Dose is not a reliable guide, because some people develop the effect at low intakes, PubMed 42292819. It requires clinician supervision and potassium monitoring. ↩
On sodium and fluid loading: increased salt and fluid intake is standard management for symptomatic orthostatic hypotension, alongside medication review and compression garments, PubMed 41941194, and the same first-line approach applies in POTS, PubMed 42635998. It is contraindicated in heart failure, chronic kidney disease and hypertension, which is why this page scopes it rather than presenting it as general advice. The apparent contradiction with our hypertension and stomach cancer pages is real and intended: the same nutrient is handled oppositely in opposite conditions. ↩
On ashwagandha: the NIH National Center for Complementary and Integrative Health reports that it may be safe for up to 3 months while long-term safety is unknown, that rare cases of liver injury have been linked to it, that it should be avoided in pregnancy and breastfeeding, before surgery and in autoimmune or thyroid disorders, and that it may interact with medicines for diabetes, high blood pressure, seizures and thyroid disease, with immunosuppressants and with sedatives, NCCIH, ashwagandha. ↩
On rhodiola: the NIH National Center for Complementary and Integrative Health notes that it is promoted for athletic performance, mood, cognition, energy and stress, that interactions with a blood pressure medicine have been reported, and that little is known about its safety in pregnancy or breastfeeding, NCCIH, Rhodiola. ↩
On nonpharmacological measures: compression garments (waist-high are more effective than knee-high), physical counter-maneuvers such as leg crossing and thigh contraction, raising the head of the bed, rising in stages and avoiding large high-carbohydrate meals in postprandial hypotension. These are first-line, PubMed 41941194, and have a better risk profile than anything in a supplement aisle. ↩
On the presentations that are emergencies: NHS guidance advises calling emergency services for anyone who has passed out and is not responding normally, for severe difficulty breathing where a person is gasping, choking or cannot get words out, for lips or skin turning pale, blue or gray, and for chest pain that feels tight or like squeezing or that spreads to the arms, neck or jaw, and advises not driving yourself, NHS, heart attack. ↩
National Center for Complementary and Integrative Health (NIH), nccih.nih.gov, and the Linus Pauling Institute Micronutrient Information Center, lpi.oregonstate.edu/mic. ↩
Karimi M, Pirzad S, Hooshmand F, Shirsalimi N, Pourfaraji SMA. Effects of coenzyme Q10 administration on blood pressure and heart rate in adults: a systematic review and meta-analysis of randomized controlled trials. Int J Cardiol Cardiovasc Risk Prev. 2025;26:200424. PubMed 40495903. Across 45 randomized trials in adults, CoQ10 lowered systolic blood pressure by about 3.4 mmHg on average, with no significant change in diastolic pressure. ↩