One of the things the keto diet does is put you into ketosis. This causes a lot of changes in your body including a lot of cell regeneration. Old damaged cells are destroyed and replaced with new healthy cell. My choice personally is to use intermittent fasting in order to reach ketosis. I am currently doing daily 24hr fasts, where I only eat once a day. HGH gets a real boost towards the end of each fast.Then I eat a very broad based organic plant and fish based diet that I call JERF. Just eat real food. I try to eat foods that would naturally be in season, so don't eat grains and most fruits all year long. This is not always that simple, so what I do work hardest at is just eating lots of different foods throughout the year. The number one thing I avoid is any GMO, processed, or added sugar food. Basically anything produced by a corporation or backed by a politician. I also take no medications, or other drugs.