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205 compounds tracked
9,568 compound measurements
5,891 studies cited
3,215 foods measured
USDA laboratory data
Every claim cited to PubMed

Skin & Hair / Hair Growth

Hair Growth

Iron, biotin, protein: what deficiency does to hair and what helps.

Can Iron Deficiency Without Anemia Still Cause Hair Shedding?Low ferritin can trigger telogen effluvium even before bloodwork shows full blown anemia.

Does Rosemary Oil Work as Well as Minoxidil for Thinning Hair?A look at the evidence comparing this natural extract to the standard drugstore treatment for androgenetic alopecia.

Key nutrient guides

Foods high in ironIron is a core component of hemoglobin, which carries oxygen through the blood. Steady iron intake supports energy levels and endurance.

Foods high in zincZinc supports immune function, wound healing, and protein synthesis, and it plays a role in recovery after physical activity.

More in Skin & Hair

Foods for SkinThe nutrients behind collagen, clarity, and skin aging, and where to get them.

Acne & DietSugar, dairy, and the diet levers with real evidence for acne.

Collagen & AgingCollagen synthesis, peptides, and the cofactors that make them work.