Premature hair graying is common and linked to stress, obesity, vitamin deficiencies, family history, lack of exercise, smoking, and allergies.
September 2020 in “Annals of Punjab Medical College” Alopecia areata in children is more common in boys, mainly affects the scalp, and is linked to genetics and psoriasis.
59 citations,
August 2004 in “Human Reproduction Update” Testosterone replacement can help women with low libido and mood, but they need to have enough estrogen first to avoid side effects.
September 2021 in “Physiology News” Conditions affecting sex development show that sexual diversity is a natural part of human variation.
November 2021 in “International Journal of Immunology and Microbiology” Thyroid hormone imbalances can cause hair loss in alopecia patients.