Eating fewer carbs might help lower blood pressure a little bit over time, especially in people who are overweight.

If someone with very high blood pressure eats almost no salt, lots of carbs, and very little fat or protein for about three months, their blood pressure might drop by nearly 45 points — this diet could really help people with dangerously high blood pressure.

When obese people eat fewer carbs (as a percentage of their calories), their blood pressure and triglycerides drop—even if they don’t lose weight—improving their heart health.

Low-carb diets help people with obesity lose a little weight at first, but the benefits fade after a year, so they might not work well for keeping weight off long-term.

If you're a healthy woman with obesity and you eat very few carbs for six months, your blood pressure, cholesterol, and blood sugar won't get worse than if you ate less fat instead — and both diets help you just about the same.

If you're an adult with obesity, sticking more closely to a low-carb diet might help lower your top blood pressure number and overall cholesterol a little — but the data isn't strong enough to say for sure, and it doesn't seem to affect your bottom blood pressure number or triglycerides.