Stroke survivors face a meaningful risk of having a second stroke, and many of the factors that raise that risk are within your control. Avoiding certain foods, medications, supplements, and habits can significantly lower the chances of recurrence and help recovery go more smoothly. Here’s what to steer clear of and why it matters.
High-Sodium Foods
Excess sodium is one of the biggest dietary threats after a stroke because it directly raises blood pressure, the single strongest risk factor for recurrence. The American Heart Association sets a target of 1,500 mg of sodium per day for people at high cardiovascular risk, which includes anyone who has already had a stroke. For context, the average American consumes well over 3,000 mg daily.
In clinical trials, cutting sodium from around 3,500 mg to roughly 1,100 mg per day lowered systolic blood pressure by nearly 23 points in people with resistant hypertension. That’s a substantial drop, comparable to what some medications achieve. The foods responsible for most hidden sodium are restaurant meals, processed meats (deli turkey, bacon, sausage), canned soups, frozen dinners, bread, and condiments like soy sauce and salad dressings. Reading nutrition labels and cooking at home with whole ingredients are the most effective ways to stay under that 1,500 mg threshold.
Saturated Fat and Cholesterol
After an ischemic stroke, keeping LDL (“bad”) cholesterol low is critical. Research shows that patients who brought their LDL below 70 mg/dL had a 34% lower risk of another ischemic stroke and a 42% lower risk of a heart event, compared to those whose LDL stayed above 100 mg/dL. Current U.S. guidelines recommend an LDL target below 70 mg/dL; European guidelines push even lower, below 55 mg/dL.
What this means in practical terms: limit red meat, full-fat dairy, fried foods, baked goods made with butter or shortening, and anything containing partially hydrogenated oils (a source of trans fat). The dietary patterns most consistently recommended for stroke survivors are the Mediterranean diet and the DASH diet, both of which emphasize fruits, vegetables, whole grains, fish, nuts, and fat-free or low-fat dairy while limiting saturated fat and cholesterol.
Over-the-Counter Pain Relievers (NSAIDs)
This one catches many people off guard. Common pain relievers like ibuprofen (Advil, Motrin) and naproxen (Aleve) can interfere with the protective effect of low-dose aspirin, which many stroke survivors take to prevent blood clots. These medications block the same enzyme aspirin targets, essentially undoing aspirin’s anti-clotting action when taken together. The FDA has strengthened its warning that these drugs can independently increase the risk of heart attacks and strokes as well.
If you’re on aspirin or another blood thinner after a stroke, talk to your prescriber before reaching for any over-the-counter pain reliever. Acetaminophen (Tylenol) is generally considered a safer option for routine aches, but the key point is to never assume an OTC medication is harmless just because it doesn’t require a prescription.
Herbal Supplements That Affect Blood Clotting
A number of popular supplements can either amplify or counteract blood-thinning medications, creating dangerous swings in clotting ability. If you take warfarin or a similar anticoagulant, these are the most important ones to avoid or discuss with your care team:
- Garlic supplements: Amplify the antiplatelet and anticoagulant effects of both aspirin and warfarin, increasing bleeding risk.
- Ginkgo biloba: Has been linked to spontaneous bleeding when combined with aspirin or anti-inflammatory drugs.
- Ginger: Can increase bleeding risk in people taking warfarin.
- Evening primrose oil: Slows clotting and raises bleeding risk with aspirin, NSAIDs, and warfarin alike.
- Dong quai: Increases bleeding risk with warfarin, aspirin, and NSAIDs.
- Cranberry, chamomile, and saw palmetto: All associated with increased bleeding in people on warfarin.
- Green tea (in large amounts): Contains vitamin K, which can counteract warfarin and make it less effective. In one documented case, high-dose green tea reduced a patient’s clotting measure from a therapeutic level to a nearly unprotected one.
- Grapefruit: Inhibits the breakdown of warfarin in the body, which can push its blood-thinning effect to dangerous levels.
The safest approach is to bring every supplement, vitamin, and herbal product you take to your next appointment and review them together with your provider.
Smoking
Continuing to smoke after a stroke is one of the highest-risk choices a survivor can make. A study published in Neurology tracked stroke and TIA patients who quit versus those who kept smoking. Among quitters, the five-year risk of stroke, heart attack, or death was 15.7%, compared to 22.6% for those who continued. That 34% relative risk reduction is on par with the benefit of antiplatelet therapy, statin therapy, and blood pressure medication, the very drugs prescribed specifically to prevent a second stroke. In absolute terms, quitting prevented roughly 7 additional major events per 100 patients over five years.
Nicotine narrows blood vessels, raises blood pressure, promotes clot formation, and accelerates the buildup of plaque in arteries. Every one of those effects works directly against stroke recovery. If quitting cold turkey hasn’t worked, nicotine replacement therapy, prescription options, and behavioral programs all improve success rates substantially.
Heavy Alcohol Consumption
Heavy drinking raises blood pressure, promotes irregular heart rhythms (particularly atrial fibrillation, a major stroke trigger), and can interfere with blood-thinning medications. Alcohol also adds empty calories that contribute to weight gain and metabolic problems. For stroke survivors, the safest approach is either abstaining entirely or keeping consumption very low. If you do drink, moderation typically means no more than one drink per day, and many providers will recommend less than that or none at all depending on your medications and overall risk profile.
Vigorous Exercise Without Clearance
Physical activity is strongly encouraged after stroke. It helps with recovery, lowers blood pressure, and improves cholesterol. But jumping into intense exercise without proper evaluation carries real risks, particularly for people who may have underlying heart disease, which is common in stroke survivors.
The American Heart Association recommends that stroke survivors who want to begin vigorous exercise (roughly 60% to 89% of their heart rate reserve, or activities rated at 6 METs or higher, like jogging or cycling uphill) undergo exercise testing first. During recovery, blood pressure can spike unpredictably with exertion. A systolic reading above 250 mm Hg or diastolic above 115 mm Hg during exercise is considered an absolute reason to stop. For training purposes, your target heart rate should be set at least 10 beats per minute below whichever threshold causes concerning blood pressure spikes or cardiac symptoms.
This doesn’t mean you should avoid exercise. Walking, light cycling, and guided rehabilitation are typically safe and beneficial early in recovery. The goal is to build up gradually, ideally with input from a rehabilitation team, rather than returning to high-intensity workouts on your own.
Uncontrolled Blood Pressure
High blood pressure is the single most modifiable risk factor for a second stroke, and letting it drift above target is something every survivor should actively avoid. The 2025 AHA/ACC guidelines recommend a blood pressure target below 130/80 mm Hg for neurologically stable patients with a history of stroke or TIA. Data from four randomized controlled trials and recent meta-analyses confirm that hitting this target reduces the risk of recurrent stroke, brain hemorrhage, and other major vascular events.
In practice, this means taking prescribed blood pressure medications consistently, monitoring your numbers at home, reducing sodium, staying physically active, maintaining a healthy weight, and limiting alcohol. Missing doses of blood pressure medication or assuming you can “feel” when your pressure is high are common traps. Hypertension is almost always silent, and the damage it causes between readings is cumulative.
Flying Too Soon After a Stroke
Air travel after a stroke requires some timing awareness. Mount Sinai guidelines recommend waiting at least two weeks after a stroke before flying. If you had brain surgery around the time of your stroke, wait at least one week from the surgery. Cabin pressure changes at altitude reduce oxygen levels slightly, which can be a concern when the brain is still healing. Long flights also raise the risk of blood clots in the legs, so if you do fly, staying hydrated, moving your legs regularly, and wearing compression stockings can help reduce that risk.