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The method shows hair testosterone levels reflect those in saliva, but are affected by various factors and may indicate a risk for heart attack.

The trial aims to understand how obesity and lifestyle affect circadian rhythms in people with schizophrenia and bipolar disorder.

Humans lost body hair relatively recently in evolution.

Women with moderate body hair have higher levels of certain hormones and may benefit from treatment that increases sex hormone-binding protein.

Child abuse is linked to higher BMI, but not because of hair cortisol or cortisone levels.

Transplanted hair follicles can change and adapt to new areas of the body, with the immune system possibly playing a role in this adjustment.

Hormone therapy affects hair growth in transgender individuals, with testosterone potentially causing hair loss in trans men and estrogen reducing facial/body hair in trans women; treatment options vary.

Researchers found markers that can tell if hair has been bleached, which could improve hair test accuracy.

Hair growth is influenced by hormones and goes through different phases; androgens can both promote and inhibit hair growth depending on the body area.

Twisted hair is rare in severe anorexia nervosa, found in only 2 out of 30 patients.

Testosterone treatment in trans men increases body and facial hair and may lead to hair loss over time, but severe skin issues are rare.

The conclusion is that self-concept, shame, and emotion regulation are key factors in hoarding disorder, body dysmorphic disorder, and trichotillomania, and should be targeted in treatment and research.

The hair test for vitamin D could be a useful alternative to blood tests, providing a longer-term vitamin D status, but more research is needed.

Women with excess body hair feel psychological distress influenced by societal beauty standards, but distress isn't directly linked to the amount of hair.

Hirsutism is common body hair growth due to genetics and hormones, and while not a disease, it can be distressing; virilisation includes hirsutism with other male traits and needs medical attention.

Hair samples can be used to create stem cells easily and non-invasively.

Measuring reproductive hormones in brown bear hair could help identify their sex and reproductive state, but better collection methods or lab techniques are needed.

Hair follicles could be used to noninvasively monitor our body's internal clock and help identify risks for related diseases.

Ancient hair can preserve hormones, revealing health and fertility insights.

Over half of the children had abnormal hair under a microscope, with many having genetic hair conditions.

Human hair contains more glycosaminoglycans in children than adults, and these compounds decrease with age, possibly affecting hair thickness.

Herbal paste and oil extract might improve dog hair quality by retaining lipids.

Cells from balding scalps have more androgen receptors than cells from non-balding scalps.

Ozone reacts more with unwashed hair, producing compounds due to scalp oils, which could lower ozone exposure but increase exposure to reaction products.

Cosmetic treatments like bleaching and perming can greatly reduce opiate levels in hair, possibly leading to false-negative drug tests.

Hair loss patients have different microbes in hair follicles, possibly affecting hair loss.

Pollution exposure speeds up hair damage.

Acne severity in women with PCOS is linked to younger age, lower body weight, and more body hair, but not to hormone levels.

Certain molecules in hair change with age and could be used for cosmetic treatments.

The new test can measure very small amounts of testosterone in hair, and grinding the hair up first gives more accurate results.