What do weight loss supplements aimed at blocking dietary absorption do?

Weight loss supplements that focus on blocking dietary absorption primarily work by interfering with the body's ability to absorb certain nutrients from the food consumed. When considering the options given, facilitating fat oxidation aligns more closely with the mechanisms of some weight loss supplements.

While some supplements may indeed claim to enhance fat oxidation, the primary action of those specifically designed to block dietary absorption is to reduce the number of calories, particularly from fats, that are absorbed into the body. This reduction can lead to lower overall body fat since fewer calories are available for storage.

In contrast, enhancing muscle recovery, increasing dietary fat absorption, and suppressing appetite are mechanisms associated with different categories of supplements. Some supplements may promote muscle recovery through amino acids or protein sources, increasing fat absorption would typically counteract weight loss efforts, and appetite suppression is usually managed by different compounds that help curb hunger rather than blocking absorption.

Thus, while fat oxidation might occur as a result of lower absorbed fats, the direct function of weight loss supplements aimed at blocking dietary absorption is to prevent the absorption itself, leading to lower caloric intake and potentially facilitating fat oxidation indirectly.