Shampoos and pH – Does Acidity Really Matter for Hair?
Claims about “pH-balanced” or “acidic” shampoos have appeared in advertising for decades. The implication is usually simple: an acidic shampoo is kinder to hair, while…
Surgery-Induced Hair Loss: Mechanisms, Risk Factors, and Modern Prevention
Hair loss after surgery is an under-recognized but clinically important complication. It may present as transient diffuse shedding or as permanent, localized alopecia confined to…
The Man with the Long Eyebrows – Longevity Folklore in China
Across China, stories of elderly men with impossibly long white eyebrows have circulated for centuries. These figures appear in paintings, temple murals, folk tales, opera,…
Why New Treatments for Androgenetic Alopecia Are Needed
Androgenetic alopecia (AGA), commonly known as male pattern hair loss and female pattern hair loss, is the most common cause of progressive hair thinning in…
Hirsutism in the Absence of Hyperandrogenism
Hirsutism is traditionally viewed as a clinical sign of androgen hormone excess in the body. Excessive terminal hair growth in androgen-dependent areas of the female…
Changes in Hair Lipids in Hair Loss Diseases
Hair follicle biology is increasingly understood as a system in which lipid metabolism is not peripheral, but central to structural integrity, immune regulation, and follicular…
Trichobezoar – When Hair Becomes a Life-Threatening “Hairball” in the Stomach
Although dramatic cases are uncommon, trichobezoars are a recognized clinical entity in gastroenterology and psychiatry. They sit at the intersection of hair biology, behavioral health,…
Hair Loss After Dermal Fillers – What We Know and How to Stay Safe
Why are dermal fillers suddenly linked to hair loss: Soft‑tissue fillers – particularly hyaluronic‑acid (HA) gels – have become a mainstay of minimally invasive cosmetic…
The Hair Follicle Inner Root Sheath: Structure, Differentiation, and Biological Function
The hair follicle is one of the most complex mini-organs in human biology, capable of cyclical regeneration, rapid cell differentiation, and the production of a…