The term 'fat burner' refers to dietary supplements that promise to boost fat metabolism or energy expenditure quickly, reduce fat absorption, aid weight reduction, increase fat oxidation during exercise, or produce long-term fat metabolism adaptations. These supplements frequently contain a number of chemicals, each with its own supposed mechanism of action, and it is frequently claimed that combining these compounds will have cumulative effects. Caffeine, carnitine, green tea, conjugated linoleic acid, forskolin, chromium, kelp, and fucoxanthin are among the most popular supplements that are said to boost or improve fat metabolism. The data for some of these supplements is briefly discussed in this review. Caffeine and green tea have facts to back up their fat metabolism-enhancing abilities, according to the literature. Many other supplements are lacking in proof, despite the fact that some show promise. The supplement market is driven by the supplement industry, and it is projected to develop at a faster rate than scientific evidence.