The keto diet did jump considerably in one specific category, however: This year it tied with several other diets for No. 2 in Best Fast Weight-Loss Diets (after the HMR Diet, a commercial plan that replaces most meals with pre-packaged nutrition bars and shakes), up from No. 13 last year. “Yes, you can do this for quick weight loss,” says Dr. Katz, “but I wouldn’t recommend it.”
“During physiological ketosis ketonemia reaches maximum levels of 7/8 mmol/L with no change in pH while in uncontrolled diabetic ketoacidosis it can exceed 20 mmol/L with a concomitant lowering of blood pH. Blood levels of ketone bodies in healthy people do not exceed 8 mmol/L precisely because the central nervous system (CNS) efficiently uses these molecules for energy in place of glucose,” researchers summarize.

What the expert says: ‘This is something that is used for athletes as part of their training. While it can lead to weight loss, carbohydrates are an energy source for the body, and restricting them can lead to headaches, fatigue and difficulty concentrating. You would be better to find the level of carbohydrates your body needs by eating normal portion sizes and a balance of all food groups.’

People claiming huge benefits of these supplements – despite the lack of solid scientific support – may sometimes have a financial reason to believe in the supplements. Some of these products are sold under a multi-level marketing arrangement, where sales people are paid based on commission. For example, the company Prüvit sells drinkable ketones, called KETO//OS with a multi-level marketing structure.
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