Definition

What Is a Stroke?

A stroke occurs when blood flow to a part of the brain is interrupted, causing rapid neuronal death. The brain consumes ~20% of cardiac output and tolerates ischemia very poorly, an estimated 1.9 million neurons die per minute during acute stroke. "Time is brain."

Strokes fall into two main categories: ischemic (~87%), where a clot blocks a brain artery (often from atrial fibrillation, atherosclerosis, or carotid stenosis), and hemorrhagic (~13%), where a vessel ruptures (usually from uncontrolled hypertension or aneurysm). The distinction is critical, treatment is opposite.

Transient ischemic attacks (TIA, "mini-strokes") produce stroke symptoms that resolve within 24 hours, but are urgent warnings of impending stroke. Up to 15% of TIA patients have a major stroke within 3 months. Every TIA is an emergency.

🚨 EMERGENCY: Call 911 immediately for any sudden onset of: facial drooping, arm weakness, speech difficulty, severe headache, vision loss, or sudden severe vertigo. Use the BE FAST¹ test (Balance, Eyes, Face, Arms, Speech, Time). Treatment within 3-4.5 hours of symptom onset is dramatically more effective.

Types of Stroke

🌱 Ischemic Stroke (~87%)

Clot blocks brain artery. Causes: cardioembolic (afib), large-artery atherosclerosis, small-vessel disease (lacunar). Treatment: tPA within 4.5 hours, thrombectomy within 24 hours for large vessel occlusion.

🌗 Hemorrhagic Stroke (~13%)

Vessel ruptures, bleeding into brain. Intracerebral (uncontrolled BP) or subarachnoid (aneurysm rupture). Higher mortality. Treatment: BP control⁹, neurosurgical evaluation.

🌑 TIA ("Mini-Stroke")

Stroke symptoms resolve within 24 hours (usually within minutes). NOT benign, 15% have major stroke within 3 months. Urgent workup and prevention required.

Signs & Symptoms

Recognize a Stroke, BE FAST

Sudden onset is the signature. Use BE FAST to quickly identify stroke. Time-sensitive treatment depends on rapid recognition.

⏰ BE FAST Acute Signs

⚖️

B, Balance & Coordination Loss

Sudden loss of balance, severe dizziness, difficulty walking, unable to stand. May indicate cerebellar or brainstem stroke. Easily missed.

👁️

E, Eyes / Vision Changes

Sudden vision loss in one or both eyes, double vision, blurred vision, visual field cut. Patient may bump into things on one side.

😶

F, Face Drooping

One side of face droops or feels numb. Ask the person to smile, is the smile uneven? Crooked mouth, drooping eyelid.

💪

A, Arm Weakness

One arm weak or numb. Ask the person to raise both arms, does one drift downward? May affect leg as well (hemiparesis).

📞 Critical Time-Sensitive

💬

S, Speech Difficulty

Slurred speech, garbled words, inability to speak, can't understand what's being said. Ask the person to repeat a simple sentence, is it slurred or strange?

📞

T, Time to Call 911

If ANY symptoms present, call 911 immediately. Note time of symptom onset, critical for treatment eligibility (tPA window: 4.5 hours; thrombectomy: 24 hours).

🤕

Sudden Severe Headache ("Thunderclap")

"Worst headache of my life", sudden onset, severe, peaks within seconds. Suggests subarachnoid hemorrhage (often aneurysm). Medical emergency.

😵

Confusion or Loss of Consciousness

Sudden confusion, trouble understanding, decreased consciousness. May be the only symptom in some strokes. Do not dismiss in older patients.

Diagnosis

How Stroke Is Diagnosed

🩻 Acute Imaging

📡 CT Head (Non-Contrast)

FIRST imaging, done within minutes of ER arrival. Distinguishes ischemic from hemorrhagic stroke. Cannot exclude tPA if normal early. Rules out bleed.

📡 CT Angiogram (CTA)

Visualizes blood vessels, identifies large vessel occlusion (LVO) for thrombectomy candidates. CT perfusion identifies salvageable tissue ("penumbra").

📡 MRI with Diffusion-Weighted Imaging

Most sensitive for early ischemia, detects strokes invisible on CT. Used after acute decisions, for staging and small lacunar strokes.

🔍 Etiology Workup

❤️ ECG & Holter Monitor

Identifies atrial fibrillation, major cause of cardioembolic stroke. Extended monitoring (30 days+) often needed to detect paroxysmal afib.

🫀 Echocardiogram

Looks for cardiac source of embolism, patent foramen ovale (PFO), thrombus, valvular disease. TEE (transesophageal) more sensitive.

🩺 Carotid Doppler/Duplex

Identifies carotid stenosis, >70% stenosis often warrants endarterectomy or stenting to prevent recurrence.

🩸 Vascular Risk Workup

Lipid panel, HbA1c, homocysteine, Lp(a), CRP, hypercoagulability panel in younger strokes. Identifies modifiable risk factors.

Treatment Comparison

Holistic vs. Conventional Treatment

🌿 HOLISTIC

💊 CONVENTIONAL

🌿

Holistic / Functional Approach

PREVENTION (80% of strokes preventable) + RECOVERY support. Acute treatment is hospital-only.

Acute Stroke

EMERGENCY, call 911. No holistic acute treatment. Every minute matters.

Prevention

~80% of strokes preventable via BP control, lipids, diet, exercise, smoking cessation

Post-Stroke Recovery

Neuroplasticity supported by nutrition, exercise, intense rehab, sleep, social engagement

Recurrence

~25% recurrence within 5 years without aggressive secondary prevention

Comprehensive Prevention & Recovery

Aggressive blood pressure control, target <130/80. Single most important modifiable factor. Each 10mmHg reduction → 27% stroke risk reduction.
Mediterranean or DASH diet, 30% stroke risk reduction. Vegetables, fruits, fish, olive oil, nuts, whole grains, beans.
Quit smoking, stroke risk falls 50% within 1 year. Equal to baseline non-smoker within 5 years.
Aerobic exercise 150+ min/week, reduces stroke risk 25-30%. Resistance training 2x/week.
Address sleep apnea, major and underdiagnosed risk factor. CPAP if AHI >15.
Limit alcohol, <1 drink/day women, <2 men (or none, recent evidence suggests no safe amount)
Optimize diabetes control, HbA1c <7. Prediabetes (HbA1c 5.7-6.4) also increases risk.
Treat afib aggressively, anticoagulation per CHA2DS2-VASc³ score
Address atherosclerosis, LDL <70 in high-risk; statin therapy proven; address Lp(a)
Omega-3 EPA/DHA, reduce inflammation and arrhythmia risk
Stress reduction, meditation, yoga; chronic stress elevates BP and clotting
Post-stroke: intense rehab, physical, occupational, speech therapy. Neuroplasticity drives recovery, especially first 6 months.
Post-stroke nutrition, Mediterranean diet supports recovery; correct dysphagia-related malnutrition

✅ Critical: ~80% of strokes are preventable. The big four: control BP, don't smoke, eat Mediterranean, exercise. Add: treat afib if present, optimize cholesterol, control diabetes. These interventions are far more powerful than any drug for STROKE PREVENTION.

💊

Conventional / Medical Approach

Acute: tPA + thrombectomy². Secondary prevention: antiplatelets, anticoagulants, statins, BP control.

Acute Ischemic (≤4.5h)

IV tPA (alteplase or tenecteplase), restores flow; 30% increase in good outcomes

Large Vessel Occlusion

Mechanical thrombectomy up to 24 hours, game-changing for LVO strokes

Hemorrhagic

BP control, reverse anticoagulation, neurosurgical evaluation for evacuation

Secondary Prevention

Antiplatelet/anticoagulant + statin + BP control + lifestyle

Standard Treatment & Secondary Prevention

Acute ischemic stroke (within 4.5 hours): IV tPA (alteplase) or tenecteplase, dissolves clot. Strict eligibility criteria (no recent surgery, normal coag, no hemorrhage on CT).
Mechanical thrombectomy (within 24 hours): catheter-based clot retrieval for large vessel occlusion. Dramatically improves outcomes.
Hemorrhagic stroke: aggressive BP lowering (target SBP <140), reverse anticoagulation (4-factor PCC for warfarin; idarucizumab for dabigatran; andexanet for factor Xa inhibitors), neurosurgery evaluation
Antiplatelet therapy (non-cardioembolic): aspirin 81mg + clopidogrel for 21 days then either alone. Long-term aspirin or clopidogrel.
Anticoagulation (cardioembolic/afib): DOACs (apixaban, rivaroxaban, edoxaban) preferred over warfarin
High-intensity statin: atorvastatin 80mg or rosuvastatin 40mg, target LDL <70
BP control: target <130/80; ACE inhibitors, ARBs, calcium channel blockers, thiazide diuretics
Carotid intervention: endarterectomy or stenting for symptomatic stenosis >70%
PFO closure: in selected younger patients with cryptogenic stroke
Rehabilitation: critical first 6 months; physical, occupational, speech therapy intensive

⚠️ Time Is Brain: Treatment within 90 minutes ("golden hour") more than doubles chances of full recovery. Even within the 4.5-hour tPA window, every 15-minute delay reduces benefit. Know stroke symptoms, call 911 immediately, do NOT drive yourself.

Nutritional Strategy

Diet for Stroke Prevention & Recovery

Mediterranean and DASH diets reduce stroke risk ~30%. Post-stroke: same diet supports brain recovery via reduced inflammation and improved vascular health.

✅ Prioritize:

🥬 Leafy Greens & Vegetables

5-7+ servings daily. Nitrate-rich vegetables (beets, spinach, arugula) lower BP. Folate-rich foods lower homocysteine.

🐟 Fatty Fish (2-3x/week)

Wild salmon, sardines, mackerel. Omega-3 reduces stroke risk and supports neuroplasticity post-stroke. Anti-arrhythmic effects.

🫒 Extra Virgin Olive Oil

2-4 tablespoons daily as primary fat. PREDIMED trial showed 30% reduction in cardiovascular events including stroke.

🫐 Berries & Fruits

Especially berries, citrus, apples. Flavonoids improve endothelial function. Potassium-rich foods (bananas) help BP.

🌰 Nuts (5+/week)

Walnuts (omega-3), almonds, pistachios. 1 oz daily, improves cholesterol, BP, vascular function.

❌ Strictly Avoid/Limit:

🧂 High Sodium

Target <2,300mg/day (<1,500mg if hypertensive). Hidden in processed foods, restaurant meals, canned soups, deli meats. Read labels obsessively.

🍔 Processed/Ultra-Processed Foods

High intake associated with 33% increased stroke risk. Trans fats, sodium, additives, refined carbs.

🥩 Red & Processed Meats

Limit red meat <3 servings/week; eliminate processed meats (bacon, sausage, deli). Saturated fat, sodium, nitrates increase stroke risk.

🍷 Heavy Alcohol

>2 drinks/day doubles stroke risk. Recent evidence suggests no safe amount. Binge drinking particularly dangerous.

🍬 Refined Sugar & Sweet Drinks

Drive insulin resistance, hypertension. Sodas, juices, sweets. Each daily sugary drink increases stroke risk ~16%.

Supplement Protocol

Evidence-Based Supplements

For prevention and post-stroke recovery. Critical: tell your doctor about all supplements, many interact with blood thinners.

Supplement	Mechanism & Evidence	Suggested Dose	Timing	Notes
Omega-3 (EPA/DHA)	Reduces inflammation and improves endothelial function. On stroke specifically the trial evidence is unsupportive: VITAL and ASCEND, both large randomized trials of omega-3 supplements, found no cardiovascular benefit. Eating fish remains sensible; the capsules have not been shown to prevent stroke.⁵	2,000-4,000mg EPA+DHA/day	With fat meal	Caution at high doses with anticoagulants, discuss with cardiologist.
Vitamin D3	Deficiency increases stroke risk. Supports vascular health, reduces inflammation.	Test 25-OH-D first and set the dose with your clinician (titrate to 40 to 60 ng/mL, the Endocrine Society's preferred range)	With fat meal	Pair with K2 200mcg. Test baseline.
Magnesium	Reduces blood pressure and supports endothelial function. Meta-analyses associate each 100mg/day of dietary magnesium with roughly 8 to 9% lower ischaemic stroke risk, an observational finding about food intake rather than a demonstrated effect of supplements. The upper intake level for supplemental magnesium is 350 mg/day; above that the usual effect is loose stools rather than harm, but it is worth knowing.⁶	400-600mg/day	Evening	Glycinate, malate, or threonate. Avoid oxide. The upper intake level for supplemental magnesium is 350 mg/day; above that the usual effect is loose stools rather than harm, but it is worth knowing.
B-Complex (Folate, B6, B12)	Lowers homocysteine⁷, high homocysteine increases stroke risk. Methylated forms preferred for MTHFR variants.	Folate 800mcg + B6 25mg + B12 1,000mcg	Morning	Test homocysteine; target <9.
Coenzyme Q10	Mitochondrial support; reduces BP modestly; protects against statin myopathy in those on statins.	100-200mg/day	With fat meal	Ubiquinol form preferred over age 50.
Berberine	Lowers BP, lipids, blood sugar, addresses multiple stroke risk factors. Studied for glycemic control, though comparative data against prescription therapy is limited.	500mg 2-3x/day	With meals	Check drug interactions; reduces CYP3A4 metabolism.
Citicoline (Post-Stroke)	Widely used in some countries and supported by early studies, but the largest randomized trial was negative. ICTUS randomized 2,298 patients and was stopped for futility, with recovery essentially identical to placebo (odds ratio 1.03). Not established as effective after stroke.⁴	500-2,000mg/day	Divided doses	Best evidence for recovery, not prevention. Discuss with neurologist.
Vitamin K2 (MK-7)	Directs calcium to bones, away from arteries. Reduces vascular calcification.	100-200mcg/day	With fat meal	CAUTION on warfarin⁸, interferes with anticoagulation. Safe with DOACs.

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 26 August 2026. Supplement entries are cross-checked against the NIH National Center for Complementary and Integrative Health and the Linus Pauling Institute Micronutrient Information Center.¹⁰ Read this before anything else. Stroke is the most time-critical condition on this site. Every minute of a blocked artery costs roughly 1.9 million neurons, clot-busting treatment works within about 4.5 hours of symptom onset, and thrombectomy within a longer but still limited window. If someone has sudden face drooping, arm weakness or speech difficulty, call emergency services immediately. Do not wait to see if it passes, do not drive them yourself, and do not look anything up first. Nothing on this page treats a stroke, and nothing on it should delay that call by a single minute. The nutrition here is for reducing risk beforehand and supporting recovery afterwards. If you take an anticoagulant or antiplatelet, clear every supplement with your prescriber, because several affect bleeding.

American Heart Association / American Stroke Association, Heart Disease and Stroke Statistics and acute ischaemic stroke guidelines. stroke.org. Source for the epidemiology on this page, the FAST recognition acronym, and the principle that outcome depends on how quickly reperfusion is achieved. ↩
On treatment windows: intravenous thrombolysis is generally given within 4.5 hours of symptom onset, and mechanical thrombectomy for large vessel occlusion within 6 hours, extended to 24 hours in selected patients using perfusion imaging. These windows are the entire reason the emergency instruction above is written in the strongest terms available. ↩
On atrial fibrillation and stroke prevention: CHA2DS2-VASc scoring guides anticoagulation decisions, though a 2026 review notes it does not capture the whole of an individual's thromboembolic risk, PubMed 42337163. Anticoagulation substantially reduces stroke risk in atrial fibrillation: pooling 29 trials, adjusted-dose warfarin cut stroke by 64%, PubMed 17577005. This is a prescribing decision. No supplement on this page substitutes for it. ↩
ICTUS trial: Davalos A, et al. Citicoline in the treatment of acute ischaemic stroke: an international, randomised, multicentre, placebo-controlled study. Lancet. 2012;380(9839):349–357. thelancet.com. 2,298 patients randomized to citicoline or placebo within 24 hours of onset; stopped for futility, with global recovery odds ratio 1.03 (95% CI 0.86–1.25, p = 0.364). The authors concluded citicoline is not efficacious in moderate-to-severe acute ischaemic stroke. Earlier smaller studies were more encouraging, which is exactly why the large trial matters more. ↩
On omega-3 supplements: VITAL, N Engl J Med. 2019;380:23–32, and ASCEND, N Engl J Med. 2018;379:1540–1550, both large randomized trials of marine omega-3 supplementation at about 1 g/day, found no significant reduction in cardiovascular events including stroke. REDUCE-IT, which was positive, tested prescription icosapent ethyl at 4 g/day in a selected population and is not evidence for fish oil capsules. High-dose omega-3 also has a mild antiplatelet effect, which matters on this page. ↩
On magnesium: dose-response meta-analyses of prospective cohorts associate each 100 mg/day increment of dietary magnesium with roughly 8 to 9% lower risk of ischaemic stroke. (Larsson SC, Orsini N, Wolk A. Am J Clin Nutr. 2012;95(2):362–366, pooling seven prospective studies, 6,477 stroke cases among 241,378 participants. PubMed 22205313) This concerns magnesium from food, in observational cohorts, and does not establish that supplements reduce stroke. The upper intake level for supplemental magnesium is 350 mg/day. ↩
On homocysteine and B vitamins: unlike coronary disease, where homocysteine-lowering trials were null for cardiac events, meta-analyses of folic acid supplementation have suggested a modest reduction in stroke, most evident in populations without folate fortification. The effect is small and the evidence is not uniform. Treat it as a reason to correct a deficiency, not as stroke prevention in someone already replete. ↩
On vitamin K and warfarin: vitamin K directly antagonises warfarin, so starting, stopping or changing the dose of a K2 supplement destabilises the INR, and varied vitamin K intake is a recognised cause of INR fluctuation, PubMed 35685257. It does not interact the same way with direct oral anticoagulants. Anyone on warfarin should agree vitamin K intake with the clinician managing their anticoagulation, and keep it consistent rather than avoiding it entirely. ↩
On blood pressure: hypertension is the single largest modifiable risk factor for both ischaemic and haemorrhagic stroke, and blood pressure control does more to reduce stroke risk than anything else on this page. See our high blood pressure guide for the dietary detail. ↩
National Center for Complementary and Integrative Health (NIH), nccih.nih.gov, and the Linus Pauling Institute Micronutrient Information Center, lpi.oregonstate.edu/mic.