Estradiol, the primary female sex hormone, influences gut health through multiple mechanisms. It modulates intestinal permeability, immune responses, and the composition of the gut microbiome. Estrogen receptor beta (ERβ) is highly expressed in the colonic epithelium; its activation strengthens the gut barrier and reduces inflammation. Estradiol deficiency, as seen in menopause, is associated with increased intestinal permeability ('leaky gut') and dysbiosis. However, effects are highly individual and depend on diet, genetics, and lifestyle. Most evidence comes from animal models or observational studies; large human randomized trials are lacking. Direct causal proof via DNA tests is not possible. MyBody-X hormone tests do not measure current estradiol levels but only genetic variants that may slightly influence hormone metabolism. The clinical relevance for gut health is therefore limited. Anyone with suspected hormonal imbalance should consult a doctor and get blood tests. Safety note: Hormonal self-treatment without medical supervision can be risky.
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