What role does SHBG play in Haut?

SHBG (sex hormone-binding globulin) binds testosterone and estradiol, controlling their free, bioactive fractions. In skin, SHBG indirectly modulates androgen-driven processes: low SHBG raises free testosterone, which can increase sebum production and contribute to acne or hirsutism. Conversely, high SHBG may reduce androgen availability. However, the evidence is largely mechanistic or observational; direct clinical trials linking SHBG levels to specific skin outcomes are lacking. SHBG itself is influenced by insulin resistance, liver function, and diet—so a low level often signals metabolic issues rather than being a primary skin culprit. Genetic variants in SHBG (e.g., rs1799941) have weak predictive value for skin conditions. Bottom line: SHBG plays a permissive, not deterministic, role. For skin concerns, comprehensive hormone and metabolic assessment by a physician is more actionable than relying on single gene tests.