The essence of the ketogenic diet is that the body consumes fat to provide energy for the purpose of fat loss and weight loss. This method can indeed reduce weight in the short term, but the long-term (more than 1-2 years) effect is not significant, and may cause damage to the body, leading to acidosis, increase the burden on the kidneys, etc., and once you resume a normal diet, it is also easy for the weight to rebound.