7 articles
Vitamin D genuinely matters for the hair follicle — and deficiency is linked to several kinds of hair loss. But the honest message is narrower than the supplement aisle implies: correct a measured deficiency, don't megadose, and don't expect vitamin D to regrow hair if your levels are already fine.
A 2015 RCT found rosemary oil matched 2% minoxidil on hair count at 6 months — with less itching. The honest read: what that trial does and doesn't prove, and how to use rosemary oil.
Biotin only regrows hair if you're genuinely deficient — and true deficiency is rare. Worse, megadose biotin gummies distort lab tests, including ones that detect heart attacks.
Cho 2014 double-blind RCT: 400 mg/day pumpkin seed oil produced +40% hair count vs +10% placebo at 24 weeks. The mechanism, the dose, and how PSO compares to saw palmetto and finasteride.
Pygeum (Prunus africana) has strong evidence for prostate health and a plausible 5α-reductase mechanism for hair loss — but no major standalone AGA trial. Honest analysis of where it fits in your supplement stack.
A single 2010 RCT showed tocotrienol supplementation increased hair count 34.5% over 8 months. The 2025 Frontiers meta-analysis confirmed the effect — but it's still one trial. Here's what to make of it.
Saw palmetto delivers about 50–60% of finasteride's effect with a fraction of the side-effect risk — but only if you buy the right form. The full evidence + a buyer's guide.