A friend velofel may tell him about

a friend velofel may tell him about a crash diet, claiming it worked for them. No matter what, he needs to be careful because some diets will do more harm than good. Such is the case with a diet that proposes... severe caloric restrictions, complete avoidance of carbohydrates, or too much of one food such as protein. The first on the list especially - it has become quite popular nowadays to attempt extremely low-calorie diets for a "temporary" period. Temporary in ketovatru this sense should be a matter of a day or two.