What should I know about ostrogen?

Estrogen is a key female sex hormone that also plays a role in men. It regulates the menstrual cycle, bone density, cardiovascular health, and fat distribution. An imbalance (too much or too little) can be linked to cycle disorders, osteoporosis, breast cancer risk, or metabolic issues. Genetic variants in estrogen metabolism genes (e.g., CYP19A1, COMT) can influence hormone processing, but clinical relevance is often small and heavily dependent on lifestyle factors (diet, exercise, environment). Direct DNA tests for estrogen levels are not useful – hormone measurements are done via blood or saliva. The provided contexts contain no specific information on estrogen, so this answer is based on generally accepted medical knowledge.