Mechanism Overview: When Free Radicals Attack the Follicle Oxidative stress occurs when the production of reactive oxygen species (ROS) exceeds the capacity of cellular antioxidant defense systems to neutralize them. In the hair follicle, ROS are generated as normal byproducts…
Mechanism Overview: Zinc as a Follicle-Critical Cofactor Zinc is the second most abundant trace mineral in the human body (after iron) and serves as an essential cofactor for over 300 enzymes and approximately 2,000 transcription factors. In the hair follicle,…
Mechanism Overview: The Scalp as a Microbial Ecosystem The human scalp harbors a complex community of bacteria, fungi, viruses, and mites—collectively known as the scalp microbiome. This microbial ecosystem interacts… Read More →
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 →
