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Mechanism Overview: Vitamin D as a Follicle Signaling Molecule Vitamin D is technically not a vitamin but a prohormone that is synthesized in the skin upon UVB exposure and subsequently metabolized in the liver and kidney to its active form,…

Mechanism Overview: The Master Regulator of Follicle Fate The Wnt/β-catenin signaling pathway is arguably the most important molecular pathway governing hair follicle development, cycling, and regeneration. Without Wnt signaling, hair… Read More →

Mechanism Overview: Iron as a Follicle-essential Mineral Iron is the most common nutritional deficiency worldwide, and its relationship to hair loss has been recognized for over a century. Unlike biotin, where the evidence for supplementation in non-deficient individuals is weak,…

Mechanism Overview: What Biotin Actually Does in the Body Biotin (vitamin B7, also known as vitamin H) is a water-soluble vitamin that serves as an essential cofactor for five carboxylase… Read More →

Mechanism Overview: How DHT Transforms Growing Follicles Dihydrotestosterone (DHT) is the central molecular villain in androgenetic alopecia (AGA), yet its mechanism of action is far more nuanced than the simple “DHT kills hair follicles” narrative commonly found in popular media.…

Mechanism Overview: The Three Phases of Follicle Cycling Every hair on the human body cycles through three distinct phases: anagen (active growth), catagen (regression), and telogen (resting). This cycle is one of the most complex biological rhythms in the human…

Mechanism Overview: Targeting the Enzyme That Produces DHT Finasteride is a synthetic 4-azasteroid compound that specifically inhibits type II 5-alpha-reductase, the enzyme responsible for converting testosterone to dihydrotestosterone (DHT) in… Read More →

Mechanism Overview: Beyond a Simple Vasodilator Minoxidil was originally developed as an oral antihypertensive medication, and its hair growth-promoting effects were discovered serendipitously as a side effect. While often described… Read More →