Anagen · Catagen · Telogen
The Hair Growth Cycle
Every follicle cycles independently. Anagen (2–7 yrs) determines maximum length — 85–90% of scalp follicles should be here at any time. Catagen (2–3 wks) is controlled apoptosis. Telogen (2–4 mo) is rest before shedding. In androgenetic alopecia, anagen shortens from years to weeks while telogen extends, producing shorter, thinner hairs each cycle until only vellus remains.
The follicle's command center
Dermal Papilla Signaling
The dermal papilla — a cluster of specialised mesenchymal cells at the follicle base — is the master regulator of hair cycling. DP cells produce FGF-7, HGF, VEGF, IGF-1 to instruct matrix keratinocytes. When DP cell count drops below ~2,000 per follicle, terminal-hair production ceases. Maintaining papilla viability through nutrition and signaling is the central objective of any evidence-based protocol.
Blood flow as foundation
Scalp Micro-Circulation
In balding scalps, perifollicular angiogenesis decreases by up to 40% versus non-balding areas (Archives of Dermatological Research, 2016). This creates hypoxia where follicle stem cells cannot receive metabolic support for anagen induction. Restoring circulation through vasodilatory botanicals is foundational — not merely supportive.
How cortisol disrupts the cycle
The Stress–Hair Loss Axis
Chronic stress elevates cortisol, promoting premature catagen entry via p53 upregulation and IGF-1 downregulation. Substance P released from perifollicular nerves triggers mast-cell degranulation and neurogenic inflammation. Panax Ginseng's adaptogenic properties help modulate the HPA axis, reducing cortisol's impact on follicular cycling.
Free-radical damage at cellular level
Oxidative Stress & Follicle Aging
Reactive oxygen species accumulate in the follicle bulge region with age and environmental exposure. ROS damage mitochondrial DNA in stem cells, reduce ATP output, and trigger premature senescence of melanocyte stem cells (greying). Botanical SOD from Cucumis melo and polyphenols provide measurable protection against oxidative follicular aging.
Building blocks for keratin
Nutritional Requirements
Hair is 95% keratin — a sulfur-rich protein requiring cysteine, methionine, and lysine. Iron carries oxygen to the follicle bulb; deficiency is a leading cause of shedding, especially in women. Zinc regulates matrix keratinocyte proliferation. Biotin, niacin, and pantothenic acid support keratin synthesis. Topical protocols address delivery; internal nutrition supplies raw materials.
