Quick lean keto A certain study conducted by British researchers indicates that a certain hormone produced by the stomach is triggered with enough protein in the body. This is the most promising link between protein and weight loss just yet. The hormone, which is called the PYY hormone, is said to be the cure for obesity. These are the facts behind protein and weight loss programs. Protein is a good nutrient for the body. However, it is best to consult with a professional health expert before devising a protein diet of your own. s:?Rapid-Weight-Loss-Diet---.