SHBG (sex hormone-binding globulin) primarily transports sex hormones like testosterone and estrogen. A direct, independent role in gut health is not scientifically established. However, indirect links exist: SHBG levels are influenced by insulin resistance, liver function, and inflammation—factors that also modulate the gut microbiome. Low SHBG is common in metabolic syndrome, which is associated with altered gut flora. Conversely, gut bacteria may affect SHBG production in the liver via estrogen metabolism (estrobolome). The evidence is mostly mechanistic and observational. MyBody-X tests do not measure SHBG in stool or microbiome; interpreting it for gut health is speculative. Anyone with known SHBG levels should consider it within a broader hormonal and metabolic assessment, not in isolation for gut health. Safety note: Supplements aimed at altering SHBG are not recommended due to risk of hormonal imbalance.
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