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Nonablative radiofrequency treatments, especially microneedle and fractional types, can improve acne scars by 25%–75% after 3-4 sessions, with full results in 3 months and some side effects.

Amenorrhea is when a woman doesn't have periods, with primary amenorrhea starting by age 15 or within five years of breast development, and secondary amenorrhea when periods stop for three months. It affects 3-4% of women not pregnant, breastfeeding, or in menopause, mainly due to polycystic ovary syndrome, hypothalamic amenorrhea, hyperprolactinemia, and ovarian failure.

Grey hair and baldness may be linked to COVID-19 severity, but more analysis is needed; post-infectious hair loss is related to the severity of the disease and usually recovers within 3-6 months.

Guinea-pig hair and follicle proteins are mostly similar, but follicles have more group 2 proteins and fewer group 3 and 4 proteins.

Excessive hair growth in women can be harmless or signal serious health issues, and treatment often includes medication and hair removal, with noticeable results after 3-6 months.

Low-dose oral minoxidil for hair loss can cause mild excessive hair growth, usually appearing within the first 3 months, but it can be managed by adjusting the dose or removing the unwanted hair, with most people not needing to stop the treatment.

A new device, IVL-PPF Microsphere®, was created to deliver a hair loss drug for up to 3 months with one injection, potentially replacing daily pills.

A tick bite caused temporary hair loss in a man, which is a rare condition that usually gets better within 3 months.

The document concludes that specific hair and blood vessel abnormalities in infants with seizures and developmental issues may indicate Menkes disease, which lacks a cure and is often fatal by age 3.

Argan oil in hair tonic increases hair growth and weight in mice, with the best results at 3% concentration.

PrEP doesn't increase STI risk in high-risk men, anti-androgen drugs may lower ICU admission for male COVID-19 patients, a 3-point injection is better for crow's feet, and the 'Geriatric-8' tool could help assess frailty in older skin cancer patients.

Garg and Garg created an affordable, easy-to-use training program for hair restoration surgery using everyday items, which can teach a technician the basics in 3-4 weeks with two hours of daily practice.

The tincture made from nettle, sage, and horse chestnut in a 5:3:2 ratio is effective for treating telogen effluvium.

Finasteride, a hair loss drug, can cause sexual side effects like erectile dysfunction in 2.1%-3.8% of users, but these usually go away with time or if the drug is stopped. Despite this, its impact on sexual function is minimal for most men.

Thyroid hormone receptor β1 is found in human hair follicles and helps them survive.

The document concludes that accurate measurement of serum androgens is crucial for diagnosing hyperandrogenism.

Measuring androstanediol glucuronide in blood is useful for assessing and tracking treatment in women with excessive hair growth.

Cyproterone acetate effectively reduced hair growth in hirsute patients by lowering androgen levels and altering androgen metabolism.

Minoxidil effectively regrows hair in male pattern baldness.

Mice lacking Insig proteins had hair growth problems due to cholesterol buildup, but this was fixed by the drug simvastatin.

Black pepper leaf extract contains compounds that can block testosterone effects and promote hair growth.

Reconstructed skin models are useful for studying how skin processes certain chemicals.

Topical minoxidil effectively treats male pattern baldness and prevents hair loss.

Herbal nano-formulations show potential for effective skin delivery but need more research.

Minoxidil helps hair growth and boosts self-esteem in balding men.

People with hair loss may have different levels of certain hormones due to changes in hormone processing.

Certain molecules in hair change with age and could be used for cosmetic treatments.

Trilostane effectively treated hair loss in Alaskan Malamutes with no adverse effects.

A new painless method to collect hair follicles helps study DNA damage and aging.

Using 5-butylpicolinate esters improves the sensitivity and reliability of detecting testosterone and dihydrotestosterone in saliva.