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.
The one that concerned me after reading this was the lancet. According to the website, 3 groups of people had 3 different diets, each diet only containing 1000 calories. One was 90% of calories from carbs, one 90% of calories from fat, and one 90% of calories from protein. In the end, the group that ate 90% fat lost the most average weight, and the group that ate 90% carbs ended up gaining weight on average. How does this make sense if they all had the same calorie intake?