As a common food, lean meat has no weight loss effect, but eating lean meat properly can provide the body with protein and other nutrients. The main component of lean meat is protein, and one gram of protein has 4 calories. But protein has significant food thermodynamics, need to consume roughly 30% of the calories to absorb it themselves, meaning that only 70% of the calories are ultimately transferred to the body, that is, 1 gram of protein, ultimately in the human body to form 2.8 calories. A gram of carbohydrate is 4 calories and a gram of fat is 9 calories, but the food heat kinetics of carbohydrates and fats are insignificant, less than 5%. So relatively speaking, protein of the three nutrients really provides the fewest calories, while protein is satiating, you can eat lean meat properly during weight loss.