Most, if not all, over-the-counter supplements, shampoos, and oils claiming to stop hair loss lack credible scientific evidence to back their claims. Products like hair vitamins, biotin gummies, saw palmetto, Viviscal, and caffeine shampoos (e.g., Alpecin) have little to no proven efficacy. Approach these products with skepticism. The studies suggesting their effectiveness are often funded by the same companies selling them, raising significant concerns about bias, misrepresentation, and even fabrication of results. Independent research strongly indicates that these claims are misleading. Avoid wasting time and money on these products!