Searching for the best vitamin for hair growth can feel like chasing a unicorn. The truth is less click-baity and more useful: there isn’t one magic vitamin that regrows hair on every healthy scalp. Hair growth is a system, nutrient status, hormones, inflammation, genetics, stress, medications, and scalp health all interact. Vitamins help most when there’s a documented deficiency. Among those, vitamin D and iron (ferritin) are the usual heavy hitters; vitamin C helps your body absorb iron; zinc matters in specific deficiency states. As for biotin, it’s very popular, but routine mega-dosing rarely helps if you’re not deficient, and it can interfere with important lab tests.

Below is a balanced, research-tethered guide you can trust. We’ll also spotlight what’s notable in EZ Melts’ hair-sup

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