Hair Supplements Under the Microscope: Separating Clinically Proven Ingredients from Empty Promises
The US hair supplement market generates billions of dollars annually, fueled by persuasive marketing and before-and-after photography rather than rigorous clinical data. Not all ingredients are created equal—some carry genuine scientific support while others rely almost entirely on consumer optimism. This evidence-ranked guide cuts through the noise to tell you exactly what the research says about the most popular hair restoration supplements on the market today.