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Human skin responds to light with protective mechanisms, but more research is needed to understand these processes and their implications for health and therapy.

Some medications can improve skin conditions, while lifestyle factors like smoking and drinking may worsen them; treatments like monoclonal antibodies and imiquimod cream show promise for certain skin diseases.

Stopping certain drugs can improve skin conditions, arsenicosis affects over half of a Bangladeshi village, males are more vulnerable, and certain treatments are effective for warts, acne, and psoriasis. Smoking and drinking are linked to psoriasis in men, a cream helps with a type of skin cancer, and low iron levels don't directly cause chronic hair loss in women.

Using finasteride or dutasteride does not increase the risk of male breast cancer.

Small changes in hormones can significantly impact health, showing the importance of sensitive testing for chemicals that disrupt hormones.

Spironolactone, a heart and liver drug, has new uses including cancer treatment, viral infection prevention, and skin condition improvement.

Using hair dye may slightly increase the risk of non-Hodgkin's lymphoma, especially with long-term use.

A man developed a rare cancer on his scalp after a hair transplant possibly due to sun damage, laser effects, and inflammation.

Topical PUVA and tacrolimus ointment can effectively and safely treat infant alopecia universalis.

Hair greying is linked to reduced ATM protein in hair cells, which protects against stress and damage.

Skin structure complexity and variability are crucial for assessing skin toxicity in safety tests.

Chemical hair straightening can damage hair and health, needing safer alternatives and stricter regulations.

The May issue discussed publishing agreements and four studies on cholesterol in hair, cancer cell changes, hormones in the uterus, and skin protein effects.

Natural skincare products may help reduce sun damage and support the skin's daily cycle.

Some chemicals in cosmetics may harm pregnant individuals, fetuses, and newborns, and should be avoided unless necessary.

DHEA affects multiple receptors and may help with metabolic issues, but its safety and effectiveness in humans are unclear.

Cobalt is important for health but too much or too little can cause health problems, and its environmental buildup is a concern.

SHED-CM can reduce hair graying and protect against damage from X-rays.

The skin acts like an endocrine organ, making hormones that affect skin diseases and respond to stress.

Wnt-3a helps grow more skin stem cells, which could lead to new hair loss treatments.

Chemotherapy in the first trimester of pregnancy is risky, but in the second and third trimesters, it's generally safe with careful drug selection and timing.

Red light therapy is safe and effectively increases hair growth in women with hair loss.

Arctiin helps protect hair cells from damage and death caused by oxidative stress.

Teucrium polium extracts are non-toxic and effectively speed up wound healing.

Certain nutrients can help keep skin healthy as we age.

A man's relapsed leprosy was successfully treated with the antibiotic sparfloxacin.

Some alternative therapies for vitiligo show promise but need more research.

Pulsed red light boosts collagen and energy in cells faster than continuous red light.

Black ethnicity, prior PSA tests, enlarged prostate, and family history increase prostate cancer risk; Asian ethnicity, obesity, smoking, diabetes, and less sexual activity or no children decrease risk.

Products should be called 'sperm-safe' only after thorough, well-designed tests.