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Testosterone treatment for older men can have short-term benefits, but long-term risks are unclear, requiring careful evaluation and monitoring.

Men with low testosterone should be carefully evaluated and monitored before and during treatment.

Surface-modified nanoparticles mainly use non-follicular pathways to enhance skin permeation of ibuprofen and could improve treatment for inflammatory skin diseases.

Particles similar in size to hair cells penetrate hair follicles better.

Hair treatments like bleaching increase friction by exposing tiny pores on the hair surface.

Finasteride may cause suicidal thoughts and mental side effects, especially in young people with hair loss.

AR/EDA2R gene linked to early-onset female hair loss, but 20p11 gene not involved.

Oxidative stress may play a role in causing alopecia areata.

The document concludes that sexual and psychiatric side effects from 5-alpha-reductase inhibitors are reported, but more high-quality research is needed to understand how often they occur.

The conclusion is that measuring how drugs partition into artificial sebum is important for predicting their delivery into hair and sebaceous follicles, and it provides better information than traditional methods.

Rosemary extract may boost the immune system, but more research on humans is needed to confirm this.

Apple-derived procyanidin B-2 can safely promote hair growth in men.

IRS premature desquamation is not unique to CCCA and occurs in various scarring alopecias.

Six new hair loss factors in men not linked to female hair loss.

Bleaching hair causes significant damage by breaking down proteins and fatty acids.

Caffeine shampoo penetrates hair follicles deeply and stays for up to 48 hours.

No link found between new male baldness genes and female hair loss.

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

Aging makes hair thinner and rougher, with less clear edges.

Higher prolactin levels in women may be linked to pilonidal sinus disease.

Hair from people with seborrheic dermatitis is thicker scaled, more damaged, and thinner than healthy hair, and atomic force microscopy can help monitor the condition.

Finasteride crystals are held together by hydrogen bonds and weak interactions, forming synthon pseudopolymorphs.

Progesterone protects brain cells by converting to allopregnanolone and involving GABAA receptors.

Caffeine penetrates skin quickly through open hair follicles, but less through closed ones, with levels becoming equal after 22 hours.

MAGP-1 decreases with age, leading to weaker, sagging skin.

RNA from horse hair follicles can track circadian rhythms non-invasively.

No link found between aromatase gene and female hair loss.

Some oils can penetrate hair and reduce the stickiness between fibers, but mineral oil cannot.

Horses in western Iowa got sick from high selenium in local alfalfa hay.

Hydrolyzed wheat proteins penetrate all hair types effectively.