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Chitosan slows root hair growth and causes a buildup of callose at low concentrations, but at high concentrations, it only inhibits growth without callose buildup.

Men are increasingly removing body hair for looks and cleanliness, and while hair loss can cause distress, it doesn't affect their self-esteem as much as it does in women.

Low-level light therapy is FDA-approved for male pattern hair loss, increases hair count and strength, and is considered safe for use.

Some chemicals can permanently or temporarily remove color from skin and hair, which can be distressing and is not well-regulated in cosmetics.

Oxidative stress contributes to hair graying and loss as we age.

Activating Nrf2 protects human hair follicles from oxidative stress and helps prevent hair growth inhibition.

Certain immune cells contribute to severe hair loss in chronic alopecia areata, with Th17 cells possibly having a bigger impact than cytotoxic T cells.

Using longer PEG chains helps nanoparticles penetrate hair follicles better, improving drug delivery for conditions like alopecia.

Microparticles help caffeic acid stay longer in hair follicles for better treatment of folliculitis.

Biotin and acetazolamide improved hair and nail growth, mental function, and reduced headaches in a child with autism.

Excessive cell phone use may cause hair loss due to electromagnetic radiation.

AGEs may cause hair loss by increasing inflammation in hair follicles.

Hair ages and thins due to factors like inflammation and stress, and treatments like antioxidants and hormones might improve hair health.

Hair testing is a reliable method for detecting workplace drug use when done with proper sample preparation and confirmation.

Exosomes from special stem cells help treat ulcerative colitis by reducing inflammation and stress.

COVID-19 may cause different types of hair loss, and the virus's effects on hair could help understand its impact on other body parts.

Skin healing from blisters can delay hair growth as stem cells focus on repairing skin over developing hair.

Lasers are less favored for hair transplant surgery but show promise for hair growth in controlled trials.

Some migraine sufferers had no more headaches after getting a hair transplant.

The CO₂ laser is better for hair transplantation because it causes less damage than the Ho:YAG laser.

IFHUT shows better hair growth than FUE, but needs improvements in positioning, speed, and accuracy.

Microneedling can help stimulate hair growth, especially when used with other treatments, but it's not better than existing therapies.

Stressed fibroblasts greatly increase melanin production in hair, skin, and eye cells, mainly due to a growth factor called bFGF.

Rhododendrol in skin-whitening products can cause skin depigmentation and immune reactions.

Daily use of CBD-rich hemp oil significantly increased hair growth in people with hair loss.

A new hair transplant method suggests freezing and storing dense hairs for future use to address severe hair loss.

Stem cell therapy shows promise for hair loss treatment, but more research is needed to confirm its effectiveness.

The human scalp hair bulb contains different types of melanocytes with varying abilities to produce melanin.

The human scalp has different types of pigment cells in hair follicles with varying abilities to produce pigment.

The hemp extract significantly increased hair regrowth in both men and women without any side effects.