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Pregnancy can change skin disease severity, with some conditions improving and others worsening, and treatment should balance benefits and fetal safety.

Transit-amplifying cells are crucial for tissue repair and can contribute to cancer when they malfunction.

Women with female pattern hair loss have higher levels of certain androgens, suggesting increased androgen exposure to hair follicles.

Human beard hair follicles change testosterone into other related hormones, but don't much change androstenedione into testosterone.

The experiment showed that human skin grown in the lab started to form early hair structures when special cell clusters were added.

Hairless protein can both repress and activate vitamin D receptor functions, affecting gene regulation.

Low iron levels are linked to more hair loss in non-menopausal women.

Minoxidil may help hair growth after transplant surgery.

Where melanoma is on the body affects survival chances; melanomas on the back of the head are worse, while those on thighs and arms are less severe, and more sun exposure might improve survival.

This enzyme helps metabolize fatty acids and isoleucine, and could be key in treating neurological diseases and certain cancers.

Serenoa repens extract helps regrow hair and repair hair loss by activating certain cell growth pathways.

Dihydrotestosterone affects hair growth by changing the Wnt/β-catenin pathway, with low levels helping and high levels hindering growth.

Using defensins to activate stem cells may improve skin aging signs without causing inflammation.

New pregnane derivatives are effective at inhibiting an enzyme linked to hair loss and reducing oil gland activity.

Both Platelet-Rich Plasma and Minoxidil foam increase hair count in women with hair loss, but Minoxidil is more effective. However, women were more satisfied with Platelet-Rich Plasma treatment.

The tattoo machine method safely delivers an average of 1,175 µg/cm² of medication into the skin.

Testosterone can slow hair growth in adult monkeys, but a blocker called RU 58841 can counteract this and potentially help hair regrow.

Platelet-Rich Plasma (PRP), a substance from a patient's own blood, can stimulate hair regrowth in people with Androgenetic Alopecia (AGA) who haven't had success with other treatments, but more research is needed to optimize its use.

Light scatters differently from elliptical hair fibers than from circular ones, and a new model better predicts this behavior, especially for shiny highlights.

Nanofiber structure helps regenerate hair follicles.

A COVID-19 patient with severe hair loss did not improve with hair loss medication after stopping and restarting it due to the infection.

Ranitidine and finasteride lower TMAO levels, reducing heart and kidney damage by changing gut bacteria.

Procyanidin compounds from apples and barley promote hair growth and prevent hair cell death.

Photobiomodulation helps hair regrow in injured skin by aiding cell movement and secretion.

Different tests are used to see how hair care products affect hair, and choosing the right test is important for accurate results.

Gut microbes significantly affect brain steroid levels.

ERβ has potential in treating prostate cancer and neurodegenerative diseases, but human studies are needed before clinical use.

XIST RNA helps regenerate hair follicles by targeting miR-424 and activating hedgehog signaling.

Finasteride safely treats hair loss without harming hormones or reproduction, but may slightly reduce sexual function.

Keratin-associated proteins are part of the developing hair fiber cuticle.