Myths vs facts: SHBG and Darmgesundheit

SHBG (sex hormone-binding globulin) is often discussed only in the context of sex hormones, but emerging research links it to metabolic health and gut function. The gut microbiome can influence insulin sensitivity and liver health via short-chain fatty acids (e.g., butyrate), both of which regulate SHBG production. A healthy microbiome may thus indirectly support stable SHBG levels. However, the evidence is mostly mechanistic; direct human trials are lacking. Myth: 'SHBG has nothing to do with gut health.' Fact: Plausible biological pathways exist, but no firm clinical recommendation can be made. To improve SHBG, focus on a fiber-rich diet, regular exercise, and healthy body weight – not on specific gut bacteria. A microbiome test may offer clues but does not replace medical evaluation.