Lots of diets are "easy to stick to", for the short term, which 4 weeks definitely is. E.g. Keto, Intermittent Fasting, etc. Most people fall off diets in the

Lots of diets are "easy to stick to", for the short term, which 4 weeks definitely is. E.g. Keto, Intermittent Fasting, etc. Most people fall off diets in the longer term, and there are various causes, including hunger, but also including things like wanting to be able to partake in social events that feature other foods.