How weight loss lowers blood pressure

Small losses, real wins

Health agencies including the CDC and NIH note that losing 5% to 10% of your body weight can improve blood pressure, blood sugar and cholesterol. For someone at 220 lb, that's 11 to 22 lb. See your own target in seconds with the calorie deficit calculator.

The good news is that blood pressure often starts to improve within weeks of changing habits, before you reach any goal. Many of the same changes that help weight, like eating less sodium and moving more, also lower pressure on their own.

How much pressure drops

A widely cited analysis of weight-loss trials found systolic blood pressure fell by roughly 1 point (mmHg) for each kilogram lost, on average. Results vary a lot by person, and blood pressure depends on salt, sleep, alcohol, stress and genetics too.

A rough average, not a prediction for you.

Blood pressure numbers explained

Blood pressure has two numbers. The top one, systolic, is the pressure when your heart beats. The bottom one, diastolic, is the pressure between beats. US heart guidelines group readings like this:

One high reading doesn't mean you have high blood pressure. Your clinician looks at several readings over time.

A worked example at 200 lb

Say you weigh 200 lb and your systolic pressure is around 138. Losing 5%, or 10 lb (about 4.5 kg), might lower it by roughly 4 to 5 points on average. Losing 10%, or 20 lb (about 9 kg), might lower it by about 9 points, which could move you from stage 1 into the above-normal range. Your own result may be bigger or smaller.

See how long these goals might take: losing 10 pounds and losing 20 pounds.

What GLP-1 trials showed

In STEP 1, systolic blood pressure fell by about 6 points on semaglutide vs under 2 on placebo, alongside 14.9% average weight loss. In SURMOUNT-1, systolic pressure fell by about 7 points on tirzepatide, compared with about 1 point on placebo. These medicines aren't approved to treat high blood pressure, but it's a welcome side benefit. More: Wegovy and Zepbound.

Habits that help your numbers

• The DASH eating pattern: lots of vegetables, fruit, beans and low-fat dairy, and less sodium. In the original DASH trial, it lowered systolic pressure by about 5 to 6 points overall, and by about 11 points in people who already had high blood pressure.
• Less sodium. US dietary guidelines suggest less than 2,300 mg a day, and the American Heart Association says 1,500 mg is ideal for most adults.
• Moving most days: steps to miles makes walking goals concrete, and walking for weight loss shows how to build up.
• Limiting alcohol and protecting your sleep.

A sample DASH-style day

• Breakfast: oatmeal with berries and a cup of low-fat yogurt.
• Lunch: a big salad with beans, vegetables, a little cheese and an olive oil dressing.
• Snack: an apple or banana with a small handful of unsalted nuts.
• Dinner: baked salmon or chicken, a potato with the skin on, and two kinds of vegetables.

Season with herbs, lemon and garlic instead of salt, and check labels on bread, soup and deli meat, which often carry more sodium than you'd expect.

How to check at home

• Sit quietly for 5 minutes first, with your back supported and feet flat.
• Rest your arm on a table at heart level, with the cuff on bare skin.
• Take 2 readings a minute apart and write both down.
• Check at about the same times each day, and bring your log to appointments.

When to talk to your doctor

• Before changing any blood pressure medicine. As you lose weight, your dose may need to come down, and only your prescriber should adjust it.
• If you feel dizzy or faint, especially when standing.
• If home readings are very high or very low.
• If you have chest pain, severe headache or vision changes (call 911).