Is a ketogenic diet safe for people with high cholesterol?
Recent studies show that low-carb diets such as keto are more effective at raising good (HDL) cholesterol than low-fat diets [1, 2]. However, there are also studies showing that keto can increase total cholesterol (HDL and LDL) . On the other hand, low-carb, high-fat diets also decrease LDL particle concentration (LDL-P), increase the size of LDL cholesterol and decrease the amount of harmful VLDL cholesterol in the blood , all of which have a positive effect on cardiovascular fitness.
These differences in results and effect may be due to diet quality, study type, and metabolic differences between participants. But overall, keto exerts a positive effect on cardiovascular health more often than a negative one.
This means, that if you have high cholesterol, there is a strong possibility that carbohydrate restriction can be a healthy choice for you .
Beuno NB, De Melo IS, De Oliveira SL, Da Rocha Ataide T. Very-low-carbohydrate ketogenic diet v low-fat diet for long-term weight loss: a meta-analysis of randomised controlled trials . 2013 - https://www.ncbi.nlm.nih.gov/books/NBK138038/