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Some skin, hair, and nail supplements can be toxic, interact with medications, affect lab tests, and may increase cancer risk.

Excessive selenium from a supplement caused toxicity but patients recovered with care.

Hair greying is caused by oxidative stress damaging hair follicles and melanocytes.

Mice without the vitamin D receptor have bone issues and other health problems, suggesting vitamin D is important for preventing various diseases in humans.

The document concludes that the fast-growing direct-to-consumer genetic testing market lacks sufficient regulation, posing risks to consumers due to questionable test quality and accuracy.

Cytokeratin 19 and cytokeratin 15 are key markers for monitoring the quality and self-renewing potential of engineered skin.

Diversifying tea products can boost profits and meet global market demands.

The study aims to understand how mood, physical activity, light exposure, and seasonal changes affect sleep patterns.

Eating a high-fat fish oil diet caused mice to lose hair due to a specific immune cell activity in the skin linked to a protein called E-FABP.

The hair loss in Belgian Blue crossbred calves was caused by a diet issue, not by disease or infection.

Adding bentonite clays to goat diets increased milk yield, periwinkle shell improved chicken egg production, and vaccination increased muscle area and carcass yield in calves.

The circadian clock affects skin stem cell behavior, impacting aging and cancer risk.

Vitamin D and estrogen may help protect heart and kidney health, and maintaining sufficient vitamin D levels could be especially beneficial for African Americans, postmenopausal women, and people with chronic kidney disease.

Thyroid and gonadal hormones control seasonal hair growth and molting in male European badgers.

SLICK cattle have better heat tolerance due to specific gene expression and pathway differences.

Dosing time affects finasteride's effectiveness and safety in rats.

There are significant gaps and inconsistencies in diagnosing and treating alopecia areata in Greece and Italy.

Bone-marrow and epidermal stem cells help heal wounds differently, with bone-marrow cells aiding in blood vessel formation and epidermal cells in hair growth.

The method increases stem-like cells for better skin regeneration.

TGF-β is crucial for tissue repair and can cause diseases if not properly regulated.

Calcium affects where root hairs grow, but other unknown factors determine their growth direction.

Hair follicle stem cells use specific chromatin changes to control their growth and differentiation.

Blue light promotes hair growth by interacting with specific receptors in hair follicles.

Two-photon microscopy helps observe hair follicle stem cell behaviors in mice.

Working night shifts for four days can lower the body's ability to use insulin, which may increase the risk of type 2 diabetes.

Goat reproductive activity and coat growth are affected by light and temperature, with temperature altering prolactin levels and hair growth, but not melatonin or estrus onset.

Natural 5α-reduced glucocorticoids might be anti-inflammatory with fewer side effects than current options.

Activin B improves wound healing and hair growth by helping stem cells move using certain cell signals.

Scientists created a long-lasting stem cell line from human hair that can turn into different skin and hair cell types.

Continuous light exposure in rats leads to PCOS-like symptoms and suggests sleep habits might affect the disorder's development.