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Human skin can make serotonin and melatonin.

The timing of when the gene Bmal1 is active affects aging and survival, with its absence during development, not adulthood, leading to premature aging.

Grafted rodent and human cells can regenerate hair follicles, but efficiency decreases with age.

EGF and KGF signalling prevent hair follicle formation and promote skin cell development in mice.

Hidradenitis suppurativa is caused by genetic factors, inflammation, bacteria, hormones, and lifestyle factors like obesity and smoking.

LGR5 helps maintain corneal cell characteristics and prevents unwanted changes by controlling specific cell signaling pathways.

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

Oestrogens help maintain healthy skin, heal wounds, and may protect against skin aging and cancer.

Different scaffold patterns improve wound healing and immune response in mouse skin, with aligned patterns being particularly effective.

Hedgehog signaling helps keep hair follicle stem cells the same in both young and old human skin.

Hair growth is influenced by interactions between skin layers, growth factors, and hormones, but the exact mechanisms are not fully understood.

Skin tumor regression is helped by retinoic acid signaling blocking Wnt signaling.

Certain microRNAs in the fluid around eggs are linked to Polycystic Ovary Syndrome and may help diagnose it.

COVID-19 might affect male fertility, but more research is needed to understand the full impact.

Thyroid hormone affects skin health, with too little causing rough, pale skin and too much leading to smooth, thin skin, and may also impact wound healing and skin conditions.

MicroRNAs play a crucial role in skin and hair health, affecting everything from growth to aging, and could potentially be used in treating skin diseases.

Lizards can regrow their tails, and studying this process helps understand scar-free healing and limb regeneration.

Different species and human skin models vary in their skin enzyme activities, with pig skin and some models closely matching human skin, useful for safety assessments and understanding the skin's protective roles.

Cysteine-rich keratins evolved independently in mammals, reptiles, and birds for hard skin structures like hair, claws, and feathers.

A substance called VIP might protect hair follicles from being attacked by the immune system, and problems with VIP signaling could lead to hair loss in alopecia areata.

Thyroid hormones are important for skin health and might help treat skin diseases, but more research is needed to understand their effects fully.

Blocking the androgen receptor in skin cells reduces their growth response to male hormones, suggesting a possible treatment for skin conditions linked to androgens.

Removing vitamin D and calcium receptors in mice skin cells slows down skin wound healing.

Prenatal stress changes how male and female rats enjoy rewards differently, linked to sex hormones.

Hepatitis C virus can cause skin diseases and dermatologists play a crucial role in identifying these conditions.

Scientists identified three genes important for processing certain brain chemicals, thyroid hormones, and medications.

Sinapic acid may help hair growth by activating a specific cell pathway.

Spironolactone harms fish reproduction and is more potent in fish than invertebrates, needing environmental monitoring.

Erbium glass laser treatment may help with skin remodeling, reduce inflammation, and improve skin cell maturation.

Thyroid hormones affect skin texture, hair and nail growth, and can cause skin diseases related to thyroid problems.