https://www.webmd.com/heart-disease/news/20230306/keto-diet-doubles-risk-heart-attack-stroke-study

People who ate foods high in fat and low in carbohydrates were more likely to have higher cholesterol and experience heart attacks or strokes, compared to people who followed a standard diet. Keto diets were also associated with a doubled risk of needing procedures to open up clogged arteries.