A new study found a serotonin-estrogen link that may contribute to women's 2-3 times higher risk of autoimmune diseases. Interestingly, certain mushrooms like reishi and lion's mane have been shown to modulate serotonin systems and possess estrogen-like effects, potentially offering natural alternatives for managing hormonal health issues. For instance, reishi mushrooms have demonstrated a 9.3% reduction in breast cancer cell viability, while lion's mane has shown promise in reducing menopausal symptoms by up to 50% in some studies.