Understanding Hair Loss: The Growth Cycle and New Treatments to Revitalize Hair Growth
- Kevin Micheal Daus, M.D.
- Jun 9
- 3 min read
Hair loss can feel confusing and worrying, especially when it starts happening at a young age. Many people think hair loss only happens to older adults, but it can affect teenagers and young adults too. Understanding why hair falls out and how new treatments work can help you feel more in control. This post explains hair loss in simple terms, focusing on the hair growth cycle and the latest treatments that can help bring hair back to life.
How Hair Grows: The Hair Growth Cycle
Hair doesn’t grow all the time. Instead, it goes through a cycle with three main phases:
Anagen phase (growth phase)
This is when hair actively grows. It can last from 2 to 7 years. The longer this phase lasts, the longer your hair can grow.
Catagen phase (transition phase)
This phase lasts about 2 to 3 weeks. Hair growth stops, and the hair follicle shrinks. The hair prepares to fall out.
Telogen phase (resting phase)
This phase lasts around 3 months. Hair doesn’t grow but stays attached to the follicle. At the end of this phase, the hair falls out, and a new hair starts growing in the follicle.
Normally, about 85-90% of hair is in the anagen phase, while 10-15% is in the telogen phase. Losing 50 to 100 hairs a day is normal because of this cycle.
Why Does Hair Loss Happen?
Hair loss happens when the natural cycle is disrupted. This can occur for many reasons:
Genetics
The most common cause is hereditary hair loss, called androgenetic alopecia. It affects both men and women and causes hair follicles to shrink, shortening the anagen phase.
Hormonal changes
Hormones like testosterone and its byproduct DHT (dihydrotestosterone) can shrink hair follicles, especially in people genetically sensitive to it.
Stress and illness
Physical or emotional stress can push hair into the telogen phase early, causing more hair to fall out.
Nutritional deficiencies
Lack of vitamins like iron, vitamin D, or protein can weaken hair growth.
Medical conditions and medications
Some illnesses and drugs can cause hair loss as a side effect.
How New Treatments Help Hair Grow Again
Scientists have learned that many hair loss treatments work by encouraging hair follicles to return to the anagen phase. Here are some of the most effective options available today:
1. Minoxidil (Topical Solution)
Minoxidil is a medicine you apply directly to the scalp. It helps increase blood flow to hair follicles and can extend the anagen phase. Many people see thicker hair after using it for several months. It is available over the counter and is one of the most common treatments.
2. Finasteride (Oral Medication)
Finasteride is a pill that blocks the conversion of testosterone to DHT, the hormone that shrinks hair follicles. It is mainly used by men and requires a prescription. It can slow hair loss and help regrow hair by protecting follicles from hormone damage.
3. Low-Level Laser Therapy (LLLT)
This treatment uses special red light lasers to stimulate hair follicles. The light increases cell activity and blood flow, encouraging hair to enter the growth phase. Devices like laser combs or helmets are available for home use.
4. Platelet-Rich Plasma (PRP) Therapy
PRP therapy involves drawing a small amount of your blood, processing it to concentrate platelets, and injecting it into the scalp. Platelets contain growth factors that can stimulate hair follicles and improve hair density.
5. Hair Transplant Surgery
For more advanced hair loss, hair transplant surgery moves healthy hair follicles from one part of the scalp to thinning areas. This method provides permanent results but requires recovery time and can be costly.
6. New and Emerging Treatments
Researchers are exploring new options such as:
Stem cell therapy to regenerate hair follicles
JAK inhibitors that block inflammation linked to hair loss
Topical growth factors to boost follicle health
These treatments are still being tested but show promise for the future.
Tips to Support Healthy Hair Growth
Besides treatments, some habits can help keep your hair healthy:
Eat a balanced diet rich in protein, iron, and vitamins
Avoid harsh hairstyles that pull on hair
Use gentle hair care products
Manage stress through exercise or relaxation techniques
Avoid smoking and limit alcohol consumption
Your Hair Loss Story May Not Be Over!
If you are experiencing shedding, thinning, scalp irritation, slow growth, or you have been told that your only option is a hair transplant, we invite you to take a deeper look.
At Juanderful Aesthetics, our hair restoration approach combines certified trichology care, advanced scalp therapies, regenerative treatment options, and oversight from our in-house physician when medical evaluation, prescriptions, or lab review may be appropriate.
Our Juanderful promise is simple: We don’t just treat hair loss — we look deeper, restore hope, and help you understand what your scalp and body may be trying to tell you!