Here's a refined version of your post: Over the past 15 years, I have personally tested several popular diets for 3 to 6 months, including vegetarian, Mediterranean, ketogenic, carnivore, and their variations. My testing involved measuring my physical performance through sports and through various fasting protocols (23/1, 3-day dry fasts, and up to 8-day fasts). Key takeaway: Before embarking on any diet and fasting experiment, ensure that you are metabolically healthy.