Your gut microbiome is deeply connected to hormone balance. It influences how hormones are produced, metabolised, and eliminated.
Estrogen balance: The “estrobolome” (a collection of gut bacteria) regulates how estrogen is recycled. If these bacteria are imbalanced, estrogen can build up, leading to heavy periods, PMS, or weight gain.

Cortisol and stress: Gut inflammation activates the stress response, raising cortisol and worsening adrenal dysfunction.

Thyroid function: Nutrient absorption happens in the gut. Poor gut health reduces uptake of iodine, selenium, and iron, all of which are essential for thyroid hormone production.
Mood and energy: Around 90% of serotonin is produced in the gut. Dysbiosis (imbalanced gut bacteria) can contribute to anxiety, depression, and fatigue.

What helps: A diet rich in fibre, fermented foods, and anti‑inflammatory nutrients supports gut health. Probiotics, prebiotics, and microbiome testing may also be useful. Addressing gut health often improves both digestion and hormone stability.