The Hair Growth Cycle
The three phases every hair goes through — anagen, catagen, telogen — and why they explain beard genetics.
Every hair on the human body follows a three-phase cycle: anagen (growth), catagen (transition), telogen (rest). Beard hairs have shorter anagen phases than scalp hairs — which is why beards top out at 24–36 inches while scalp hair can grow to 30+. The length of your anagen phase is genetic and non-modifiable.
- ›Anagen: growth phase, 2–6 years for scalp, 2–3 years for beard.
- ›Catagen: transition, 2–3 weeks.
- ›Telogen: rest, 2–3 months, then hair sheds.
- ›Anagen length is genetic — can't be extended.
- ›Beard maxes out at 24–36 inches for most men.
Why 'growth serums' can't override genetics
No product can extend the anagen phase past its genetic ceiling. Products like castor oil and Grizzly Gold Standard Beard Oil support follicle health — meaning existing hairs grow to their full genetic length in optimal condition. That's a real, visible improvement, but it's not 'unlocking' longer growth.
History & Origin
The three-phase model of hair growth — anagen, catagen, telogen — was established through mid-20th-century histology and remains the framework for everything from hair-loss treatment to beard-growth expectations. Facial hair follows the same cycle as scalp hair but with a much shorter growing phase, which is the single most important fact behind the question 'why won't my beard grow longer?'
Uses & Benefits
- ›Anagen (growth): active growth, lasting months to a few years on facial hair
- ›Catagen (transition): a short regression phase of two to three weeks
- ›Telogen (rest): the follicle is dormant before the hair sheds
- ›Each follicle cycles independently, which is why shedding is gradual
- ›Anagen duration sets your terminal beard length — not trimming or products
Safety & Sourcing
Shedding 50 to 100 hairs a day overall is normal. Sudden diffuse shedding several months after illness, surgery, crash dieting, or major stress is usually telogen effluvium, which typically resolves on its own. Persistent patchy loss with smooth bald circles is a different matter — that warrants a doctor's look.
FAQ
Why won't my beard grow past a certain length?+
Because your anagen phase ends and the hair sheds. That terminal length is genetic and no product extends it.
Does trimming make hair grow faster?+
No. It removes damaged ends, which makes the beard look healthier and reduces breakage — a different thing from faster growth.
Why is my beard shedding in the shower?+
Individual follicles enter telogen and release their hair. A modest amount daily is normal.
Found in Our Products
Related Comparisons
Sources
- Paus, R. & Cotsarelis, G. (1999). The biology of hair follicles. New England Journal of Medicine.
- Randall, V. A. (2008). Androgens and hair growth. Dermatologic Therapy.
