Sex hormone binding globulin (SHBG) is a glycoprotein that binds to sex hormones, limiting their levels in the body. It is produced in the liver, brain, uterus, testicles, and placenta. SHBG levels are influenced by hormones such as insulin, growth hormone, estrogen, and thyroxine. Low levels are linked to diabetes, hypothyroidism, and polycystic ovary syndrome. […]