Eating a keto diet (very low-carb, high-fat) seems to raise cholesterol levels in grown-ups by a small but measurable amount - about 0.36 units on average, according to 27 research studies.

Eating a ketogenic diet (very low carb, high fat) makes the 'bad' cholesterol called LDL go up in adults by about 0.35 mmol/L on average, according to 27 research studies.

People who eat a lot of fat and very few carbs tend to have higher cholesterol numbers than those who eat plant-based or mixed diets, and more than 7 in 10 of them have cholesterol levels that doctors consider too high—especially if they’re eating super low-carb.

Following a ketogenic (keto) diet—very low in carbs and high in fat—appears to lower the amount of fat called triglycerides in people's blood by about 0.2 units, according to research combining results from 27 different experiments.

People who are lean and healthy and eat a strict low-carb keto diet for years — even if it raises their 'bad' cholesterol a lot — don’t seem to have more heart plaque than similar people with lower cholesterol.

Even if healthy, slim people on a keto diet have very high 'bad' cholesterol, it doesn't seem to be linked to buildup in their heart arteries.