Mechanism Overview: The Molecular Architecture of Hair Hair is composed of approximately 95% keratin—a family of fibrous structural proteins that form the hair shaft’s remarkable combination of strength, flexibility, and chemical resistance. The keratin in hair is “hard” or “alpha-keratin,”…
Mechanism Overview: Selenium and the Selenoprotein Family Selenium is an essential trace element that is incorporated as the amino acid selenocysteine into 25 human selenoproteins—enzymes and proteins that play critical roles in antioxidant defense, thyroid hormone metabolism, and redox signaling.…
Mechanism Overview: Caffeine as a Follicle Stimulant Caffeine (1,3,7-trimethylxanthine) is the most widely consumed psychoactive substance in the world, and its potential effects on hair growth have generated significant scientific and commercial interest. The evidence base began with an influential…
Mechanism Overview: Inflammation as a Driver of Follicle Dysfunction Inflammation in the hair follicle is not always visible to the naked eye, but subclinical perifollicular inflammation has been documented in a significant proportion of patients with androgenetic alopecia, alopecia areata,…
Mechanism Overview: Blood Supply as a Growth Limiting Factor Vascular endothelial growth factor (VEGF) is the master regulator of blood vessel formation and a critical mediator of the vascular remodeling that accompanies each hair growth cycle. During anagen, the perifollicular…
Mechanism Overview: A Natural 5-Alpha-Reductase Inhibitor? Saw palmetto (Serenoa repens) is a small palm native to the southeastern United States whose berries have been used medicinally for centuries, primarily for urinary symptoms related to benign prostatic hyperplasia (BPH). In the…
Mechanism Overview: Peppermint Oil’s Surprising Follicular Effects Peppermint oil (Mentha piperita) is one of the most widely discussed natural remedies for hair growth, thanks largely to a single well-designed animal study that showed remarkable results. The primary active component of…
Mechanism Overview: The Hormonal Orchestra That Controls Hair Hair follicles are exquisitely sensitive to hormonal signals. They express receptors for thyroid hormones, cortisol, estrogen, progesterone, prolactin, and androgens—making them responsive to virtually every major endocrine axis. While the role of…
Mechanism Overview: More Than an Antifungal Ketoconazole is a synthetic imidazole antifungal agent that has been used for decades to treat fungal infections of the skin, including seborrheic dermatitis and dandruff. Its use in hair loss began with unexpected clinical…
Mechanism Overview: Stem Cells as the Follicle’s Renewal Engine Hair follicles are unique among mammalian organs in their ability to undergo cyclic regeneration throughout life. This remarkable capacity depends on… Read More →
