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The library · 77 entries
Research
Every entry answers the same questions in the same order: how it works, how it’s used, what it costs, the recovery, and how strong the evidence actually is.
2 entries in Diet
Diet2
Zinc, Vitamin D & Iron
micronutrients, ferritinCorrecting a real deficiency helps a great deal. Supplementing without one does nothing — test, do not guess.
$20 – $150Biotin
vitamin B7, hair skin and nails supplementsThe most heavily marketed hair supplement, and one of the least justified. Included here specifically so you can stop buying it.
$5 – $30