You have a friend who went on a keto diet and lost a significant amount of weight in months. Based on the evidence, which of the following is NOT true?
a. They are at high risk for yo-yo dieting and will regain even more weight.
b. Their metabolism changed such that lower insulin release led to less fat deposition, even with a higher caloric intake from fat and protein.
c. They likely lost muscle mass during the diet which will lower their basal metabolic rate and make regain more likely.
d. They will not be able to adhere to that diet for years.