When healthy young adults eat a low-carbohydrate diet high in polyunsaturated fats for seven days, their blood triglyceride levels after meals are lower than when they eat a low-carbohydrate diet high in protein.

If you have metabolic issues like high blood sugar or cholesterol, eating foods that swap out butter or fatty meats for carbs (like bread or rice) or for olive oil and avocados doesn’t make a noticeable difference in your blood fat levels after meals.

If you're overweight and have type 2 diabetes, cutting carbs and eating more protein for 6 weeks can lower your blood fats (triglycerides) 18% more than the usual diabetes diet—even if you lose the same amount of weight—meaning your body handles fats better.

If you're an adult with obesity and you eat fewer carbs on a low-carb diet, you might lose more weight and see better cholesterol numbers in just a few months.

Eating fewer carbs might help people with type 2 diabetes who are overweight or obese improve their cholesterol numbers — lowering bad fats in the blood and raising good cholesterol — which could mean a healthier heart over time.

Eating a diet low in fat and high in carbs makes the body less able to clear fat from the blood, causing triglyceride levels to rise sharply.