Forget Expensive Hair Serums — These Foods Support Thicker Hair Naturally | Dr. William Li

Stop wasting money on expensive hair serums that only work on the surface. The real secret to thicker hair isn't in a bottle—it's on your plate. Dr. William Li explains why topical treatments fail and reveals the science-backed foods that actually nourish your hair from the inside out. In this video, we break down why your hair grows from a tiny command center called the dermal papilla, which is fed entirely by your bloodstream. Topical serums can't reach it, but the nutrients you eat can. Here’s what actually works for thicker hair