Most strokes are preventable. Up to 80% of strokes are linked to risk factors you can control, and the single most important thing you can do is manage your blood pressure. Beyond that, a combination of diet, exercise, not smoking, and staying on top of key health numbers gives you the strongest protection. Here’s what works and how much it matters.
Keep Your Blood Pressure Below 130/80
High blood pressure is the leading cause of stroke, and it often has no symptoms. The 2025 guidelines from the American Heart Association set a clear target: below 130/80 mm Hg for all adults. If your blood pressure stays at or above 140/90, medication is typically recommended alongside lifestyle changes. For people between 130/80 and 140/90 who already have diabetes, kidney disease, a history of stroke, or elevated cardiovascular risk, medication is also recommended.
If you fall into that 130-to-140 range without other risk factors, your doctor will usually recommend three to six months of lifestyle changes first, including diet, exercise, weight loss, and cutting sodium. If those don’t bring your numbers down, medication becomes the next step. The key takeaway: know your blood pressure, check it regularly, and don’t ignore readings that creep above 130/80.
Follow a Stroke-Protective Diet
The DASH diet (Dietary Approaches to Stop Hypertension) has the strongest evidence for stroke prevention through food. It emphasizes vegetables, fruits, whole grains, legumes, nuts, and low-fat dairy while limiting red meat, processed meat, and sugary drinks. In two large long-term studies, people who followed the DASH pattern most closely had a 14% lower risk of ischemic stroke compared to those who followed it least. Each meaningful improvement in diet quality was associated with a 7% drop in stroke risk.
The Mediterranean diet, which overlaps with DASH but adds olive oil and fish as central components, shows similar benefits. Both patterns work partly by lowering blood pressure, but they also improve cholesterol, blood sugar, and inflammation independently.
Sodium is a major piece of the puzzle. The World Health Organization recommends less than 2,000 mg of sodium per day, which is just under a teaspoon of salt. Most people consume well over that amount, largely from processed and restaurant foods rather than the salt shaker. Reading labels and cooking more meals at home are the two most effective ways to cut sodium intake.
Get 150 Minutes of Activity Per Week
Regular physical activity lowers stroke risk through multiple pathways: it reduces blood pressure, improves cholesterol, helps control blood sugar, and keeps your weight in a healthier range. The general recommendation for adults is at least 150 minutes per week of moderate-intensity aerobic activity, like brisk walking, cycling, or swimming. That works out to about 30 minutes a day, five days a week.
For people who’ve already had a stroke or a transient ischemic attack (sometimes called a mini-stroke), the AHA/American Stroke Association recommends 40-minute sessions of moderate to vigorous aerobic activity, three to four times per week. Whether adding resistance training like weight lifting provides extra stroke prevention beyond aerobic exercise alone is still unclear, but it benefits overall cardiovascular health and is worth including.
If you’re currently inactive, starting with even 10-minute walks and building up gradually still provides meaningful protection compared to staying sedentary.
Stop Smoking
Smoking damages blood vessel walls, accelerates plaque buildup in arteries, makes blood more likely to clot, and raises blood pressure. All of these increase stroke risk substantially. Quitting reverses the damage over time. Within 5 to 10 years after quitting, your stroke risk drops significantly. The sooner you quit, the sooner that clock starts.
Nicotine replacement therapy, prescription medications, and behavioral counseling all improve the odds of quitting successfully. Combining two approaches, such as a nicotine patch plus counseling, works better than either one alone.
Manage Cholesterol Levels
High LDL cholesterol (the “bad” cholesterol) contributes to plaque buildup in the arteries that supply the brain. Current guidelines set the LDL target below 100 mg/dL for people at borderline or intermediate cardiovascular risk, and below 70 mg/dL for those at high risk. If you’ve already had a stroke or heart attack and remain at very high risk, the target drops to below 55 mg/dL.
Diet changes, particularly reducing saturated fat and increasing fiber, can lower LDL by a modest amount. For many people, though, medication is necessary to reach these targets. A simple blood test (lipid panel) tells you where you stand, and it’s worth checking every few years starting in your 20s or 30s.
Control Blood Sugar if You Have Diabetes
Diabetes roughly doubles your risk of stroke because chronically elevated blood sugar damages blood vessels over time. If you have type 1 or type 2 diabetes, the general target is an A1c of 7.0% or lower, which reflects your average blood sugar over the past two to three months.
Interestingly, pushing blood sugar extremely low with aggressive treatment doesn’t appear to reduce stroke risk further. Several large trials, including the ACCORD, ADVANCE, and Veterans Affairs Diabetes trials, found no significant reduction in stroke when patients targeted near-normal blood sugar levels compared to standard control. The takeaway is that steady, moderate control matters more than extreme precision. Keeping your A1c at or below 7% protects your blood vessels without the risks that come from overly aggressive treatment, such as dangerous drops in blood sugar.
Know if You Have Atrial Fibrillation
Atrial fibrillation (AFib) is an irregular heart rhythm that allows blood to pool in the heart, where it can form clots. Those clots can travel to the brain and cause a stroke. AFib increases stroke risk roughly fivefold, and many people don’t know they have it because it can come and go without obvious symptoms.
If you’re diagnosed with AFib, your doctor will assess your annual stroke risk using factors like age, blood pressure, diabetes, prior stroke history, and vascular disease. Based on that assessment, blood-thinning medication may be recommended. For people with AFib, these medications are one of the most effective stroke prevention tools available. If you’ve ever noticed your heart racing, fluttering, or beating irregularly, it’s worth getting an evaluation.
Get Screened for Sleep Apnea
Obstructive sleep apnea, where your airway repeatedly collapses during sleep, is an independent risk factor for stroke. It’s also closely tied to high blood pressure, AFib, and other vascular problems that compound stroke risk. Common signs include loud snoring, gasping during sleep, and excessive daytime sleepiness.
CPAP therapy (a mask worn during sleep that keeps the airway open) is the standard treatment. In people who’ve already had a stroke, CPAP has been shown to improve cognitive recovery and neurological outcomes, though its effect on preventing a second stroke specifically remains uncertain based on randomized trials. Still, treating sleep apnea improves blood pressure and overall cardiovascular health, both of which matter for stroke prevention.
Limit Alcohol and Maintain a Healthy Weight
Heavy drinking raises blood pressure and increases the risk of AFib, both major stroke risk factors. Keeping alcohol intake moderate, no more than one drink per day for women and two for men, is a reasonable guideline, though less is better from a pure stroke-prevention standpoint.
Excess body weight, particularly around the midsection, increases stroke risk through its effects on blood pressure, blood sugar, and cholesterol. Losing even 5% to 10% of your body weight, if you’re overweight, can produce meaningful improvements in all three of those numbers. The most sustainable approach combines dietary changes with regular physical activity rather than relying on either one alone.