Even though low-carb diets can improve some health numbers, in people who are already obese, sticking more closely to a low-carb eating pattern might actually go hand-in-hand with having more body fat and a higher weight.

If you're an adult between 20 and 50 who's obese, eating fewer carbs and more fats might be linked to healthier blood pressure, better cholesterol, and lower triglycerides — but we can't say for sure that the diet caused these benefits from this study alone.

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.

If obese adults in Iran eat fewer carbs and more fat, they might be less likely to have a group of health problems like high blood pressure and high blood sugar that raise heart disease risk.

For people who are obese, eating a low-carb diet doesn’t seem to make a noticeable difference in their blood sugar or how well their body uses insulin.

If you're overweight and eat less fat for four weeks, you might lose more muscle than fat compared to someone who eats fewer carbs — even if both diets help you lose weight.