How Does Hair Grow? Making the Most of Every Growth Phase
Hair grows from a living follicle beneath your scalp, and every single strand is on its own journey through three phases: anagen (growing, 2 to 7 years), catagen (transitioning, 2 to 3 weeks) and telogen (resting, about 3 months). Around 90% of your hair is growing right now while the rest rests and sheds, which is why you lose 50 to 100 hairs a day without ever going bald. The practical opportunity is this: you cannot change the cycle, but you can absolutely change how well each phase goes. Here is how the cycle works, and what to do for your hair at every stage.
Key takeaways
- Hair grows about 1.25 cm a month during anagen, which lasts 2 to 7 years and is set largely by genetics.
- The longer your hair stays in anagen, the longer it can grow, nutrition, scalp care and low stress support this.
- Daily shedding of 50 to 100 hairs is the telogen phase working normally, not a warning sign.
- No product is proven to extend anagen, but poor nutrition, stress and rough handling demonstrably cut it short.
- Your job is simple: protect the growing hairs, feed the follicles, and do not panic about the resting ones.
The three phases, and what to do in each
Anagen: the growing years (2 to 7 years)
Follicle cells divide rapidly and push the strand upward by about 1.25 cm a month. Roughly 90% of your hair is here right now, and how long each follicle stays in anagen decides your maximum length, a 2-year anagen caps hair around 30 cm; a 7-year anagen allows nearly a metre. Genetics sets the range, but this is the phase where care pays off most:
- Feed the machine: follicle cells are among the fastest-dividing in your body. Protein at every meal, plus iron and zinc; biotin and zinc contribute to the maintenance of normal hair.
- Keep the scalp comfortable: a gentle nutrient-rich wash routine supports the environment follicles grow from.
- Massage the scalp: a few minutes daily supports circulation to the follicles, free, and pleasant.
- Protect the strand: a hair that grows for five years has to survive roughly 900 washes and brushings. Low heat and gentle handling keep anagen's output intact.
Catagen: the handover (2 to 3 weeks)
The follicle shrinks and the hair detaches from its blood supply, becoming a "club hair". Only about 1% of your hair is here at any time. Nothing to do in this phase, it is automatic, brief and invisible.
Telogen: the rest (about 3 months)
The club hair sits in place while a new hair quietly forms beneath it; the old one then sheds, often in the shower or brush. That is your 50 to 100 daily hairs. The one thing worth knowing: stress, illness or crash dieting can push extra follicles into telogen early, producing a heavy shed 2 to 3 months later, the condition explained in our telogen effluvium guide. Steady routines and managed stress keep the resting queue normal-sized.
Phase-by-phase cheat sheet
| Phase | Length | Share of hair | Your move |
|---|---|---|---|
| Anagen (growing) | 2 to 7 years | ~90% | Feed, massage, protect from breakage |
| Catagen (transition) | 2 to 3 weeks | ~1% | Nothing, it runs itself |
| Telogen (resting) | ~3 months | ~9% | Stay calm about shedding; manage stress |
Can you extend the anagen phase?
Honestly: no product is proven to lengthen anagen, your genes hold that dial. What is well established is the reverse: deficiencies, chronic stress, harsh treatment and an unhappy scalp shorten effective growth and push hairs to rest early. So the winning strategy is removing the things that cut growth short:
- A nutrient-dense diet, the follicle's raw materials.
- Daily scalp massage, by fingertips or a purpose-made massager, to support circulation while distributing serums or oils.
- A gentle, consistent wash routine that keeps the scalp comfortable rather than stripped.
- Stress management and sleep, the telogen queue's best defence.
- Low heat, loose styles, so anagen's centimetres survive to be seen.
A pocket-sized massager comb for working serums and oils into the scalp, turning the daily massage habit above into a two-minute ritual.
View the massager
A gentle biotin, caffeine and rosemary wash-and-condition routine that cares for the scalp your anagen hairs grow from, and helps every strand look fuller and healthier along the way.
Shop the setWatermans is a UK family business that has sold over 5 million bottles since 2012. The range is vegan and cruelty-free.
Frequently asked questions
How long does each hair growth phase last?
Anagen 2 to 7 years, catagen 2 to 3 weeks, telogen about 3 months. Each follicle runs its own independent timetable.
Can you naturally extend the anagen phase?
You cannot beat your genetic ceiling, but nutrition, scalp massage, low stress and gentle handling stop the phase being cut short, which in practice is what most people can improve.
Why do I lose hair every day?
Daily loss of 50 to 100 hairs is telogen hairs making way for new anagen growth underneath. It is the cycle succeeding, not failing.
Can stress affect my hair growth cycle?
Yes, significant stress can push extra follicles into telogen early, causing a noticeable shed about 2 to 3 months later. It usually recovers once the stress passes.
How fast does hair grow in anagen?
About 1.25 cm a month, roughly 15 cm a year. Our guide on how to grow hair fast covers making the most of that rate.
Does everyone's hair grow to the same length?
No, maximum length is set by how long your follicles stay in anagen, which is genetic. That is why some people grow waist-length hair effortlessly and others plateau at shoulder length.
Once you know the cycle, hair care stops being guesswork: protect the 90% that is growing, ignore the 9% that is resting, and give the whole system decent raw materials. For the deeper science behind each stage, see our companion guide to the three stages of the hair growth cycle, and if your shedding suddenly feels abnormal, start with is hair loss normal?
,%20catagen%20(transitioning,%202%20to%203%20weeks)%20and%20t...){kind=link}