Hair
Regular soy tracks with about 77% lower risk of hair loss
77%Lower androgenic hair-loss risk with regular soy in studied populations
Regular soy intake is associated with about 77% lower risk of androgenic alopecia in the populations studied[1], and follow-up work on isoflavones points the same way[2]. Higher meat intake was associated with greater androgenetic alopecia risk[3]. The evidence is observational, not a shampoo trial, but the direction is consistent.
What the evidence says
The main points first. Every claim is tied to a source below.
Regular soy tracks with about 77% lower risk of hair loss
Regular soy intake is associated with about 77% lower risk of androgenic alopecia in the populations studied[1], and follow-up work on isoflavones points the same way[2]. The evidence is observational rather than from a trial, but it is consistent.
Read full article →More meat, more androgenetic alopecia
Higher meat intake is associated with greater risk of androgenetic alopecia[1]. Together with the soy finding, it points the same direction from the other side of the plate.
Read full article →Articles
Men who eat soy lose less hair
Regular soy intake tracks with about 77% lower risk of androgenic hair loss, while higher meat intake tracks with more.
Read full article →
Sources
Papers and datasets. Each card keeps its caveats, including small samples and single-animal cases.
[1]PMC · Observational
Soy intake and androgenic alopecia
Regular soy intake associated with ~77% lower risk of androgenic alopecia in studied populations.
[2]PMC · Observational
Isoflavones and hair loss — follow-up
Further support for soy isoflavones and lower androgenic alopecia risk.
[3]PubMed · Observational
Meat and androgenetic alopecia
Higher meat intake associated with greater androgenetic alopecia risk.