The Guardian theguardian.com 2026-07-03 14:00

Hormones on the brain? Everything you need to know about HRT, testosterone, melatonin and more

Cortisol is bad. Testosterone makes you aggressive. Melatonin helps you sleep. Experts bust common hormone mythsFalse The main puberty hormones are oestrogen and progesterone for girls and testosterone for boys. “They are active in the womb during foetal development and in infanc

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