What type of supplements are considered fat burners?

Thermogenesis supplements are considered fat burners because they stimulate the body's metabolism and promote the process of thermogenesis, which is the generation of heat in the body. This process can increase energy expenditure and, consequently, help in burning fat more effectively. These supplements often contain ingredients like caffeine, green tea extract, and certain other compounds that are believed to enhance calorie burning and fat oxidation.

In contrast, the other options do not fit the definition of fat burners. Protein supplements primarily focus on muscle recovery and growth rather than fat loss. Vitamins and minerals play important roles in overall health but do not directly assist in fat burning. The term "fat strippers" is not a recognized category of supplements and does not refer to any specific product or mechanism related to fat loss. Thus, thermogenesis supplements stand out as the correct answer for their direct association with enhancing fat metabolism.