Weight loss ampoules—small vials containing concentrated solutions of ingredients like caffeine, L-carnitine, or herbal extracts—are marketed as “quick fixes” for shedding pounds. Proponents claim they boost metabolism, suppress appetite, or target fat cells. However, scientific evidence supporting these claims is extremely limited. Most studies on ingredients like caffeine show only marginal short-term metabolic boosts (e.g., 3–5% increase in calorie burn), which are insufficient for meaningful weight loss without diet/exercise changes. The FDA has not approved any ampoule for weight loss, and many products are sold as “supplements” (not drugs), bypassing rigorous safety testing.