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A protein called FERONIA helps control root hair growth in response to cold and low nitrogen by activating nutrient-sensing pathways in a plant called Arabidopsis.

Four genes affect hair follicle density in goats.

Hair follicles protect melanocytes from sun damage, helping them replenish skin.

Bleomycin injections in mice cause skin thickening and hair loss.

Higher dihydrotestosterone may be linked to more inflammation in COVID-19 patients with low testosterone.

Obesity negatively affects the endometrium, leading to higher miscarriage risk and impaired cell function.

The best results in surgical hair restoration come from careful techniques, optimal use of limited hair supply, correct hair direction, saving hair for key areas, understanding scarring effects, and adjusting hair graft density.

Hair bleach can make rabbit airways more sensitive.

The Brazilian candle flame technique can damage hair by melting the cuticle and exposing the cortex.

A new lab method helps assess respiratory risks of hair product aerosols without animal testing.

Bleaching hair increases pore size and changes pore structure.

Chemical hair straighteners can severely damage hair and scalp with repeated use.

Hair perms or treatments seem safe to use up to 3 to 4 times during pregnancy.

Continuous use of hair relaxers and curlers can cause hair loss, dryness, dandruff, thinning, greying, and split ends.

Dry shampoo is a convenient, eco-friendly option that cleans and nourishes hair without water.

The new hair straightening method keeps hair straight permanently by using specific creams and heat.

Hair care products can cause skin irritation and allergies.

The automated flat iron can permanently straighten hair without chemicals, especially at 154°C, and silicone improves the results.

Hair relaxers and straighteners can be toxic to skin cells.

Bubble hair deformity may be caused by hair shaft trauma and can improve with gentle hair care.

Bleaching and UV exposure significantly damage hair.

A new 6-point scale reliably measures heat damage to hair from styling tools.

Polymeric pretreatments can significantly reduce hair breakage and damage from hot flat irons.

Hair straightening can damage hair and pose health risks, including exposure to carcinogens and hair loss.

Improper use of ceramic flat irons can cause severe hair damage.

Direct heat perms cause more damage to hair than softening heat perms.

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

Bleaching hair twice makes it very dry and weak.

Hair care products can cause skin irritation and allergies.

Emollients can make fabrics more flammable, so take safety precautions.