Understanding the Anagen Hair Growth Phase: Why Your Hair May Be Thinning (And What To Do About It)

If you’ve ever wondered why your hair isn’t growing as long as it used to, why you’re shedding more than normal, or why your hair feels thinner in your 30s and 40s — the answer often starts with one word:

Anagen.

At Anagen Artistry in SW Portland, we believe beautiful hair starts at the root. Understanding your hair’s growth cycle is the first step toward stronger, fuller, healthier hair.

What Is the Anagen Phase of Hair Growth?

Hair grows in four stages, but the most important stage is the anagen phase — the active growth phase.

During Anagen:

• The hair follicle remains fully connected to its blood supply

• Cells in the root are actively producing new hair

• The strand continues to lengthen

• The scalp supports and nourishes growth

This phase lasts anywhere from 2 to 7 years, depending on genetics and overall health.

At any given time, about 85–90% of the hair on your head is in the anagen phase. The longer your anagen phase lasts, the longer and thicker your hair can grow.

When this growth window shortens, changes in density and length become more noticeable.

The Full Hair Growth Cycle Explained

To understand thinning hair, we have to look at the full cycle:

1. Anagen (Growth Phase)

Active growth. Strong attachment to the scalp. Healthy follicle activity.

2. Catagen (Transition Phase)

Lasts about 2–3 weeks. Growth slows and the follicle begins to shrink.

3. Telogen (Resting Phase)

Lasts about 3–4 months. The hair rests before shedding.

4. Exogen (Shedding Phase)

The strand releases and falls out. Losing 50–100 hairs per day is considered normal.

The concern begins when more hairs shift out of anagen earlier than expected.

Why Hair Thins in Your 40s (Especially for Women)

Many women in Portland and beyond notice subtle but meaningful changes in their 40s:

• Hair won’t grow as long

• Ponytails feel thinner

• Increased shedding

• Texture shifts

• More visible scalp in certain lighting

This often happens because the anagen phase naturally shortens with age.

Common contributors include:

• Hormonal shifts

• Chronic stress

• Lifestyle factors

• Nutritional gaps

• Genetics

When the growth phase becomes shorter, more hairs spend time resting instead of growing. Over time, this can create visible density changes — even if you still have thousands of active follicles.

Understanding Density Changes in Your 40s

Most women naturally have between 80,000 and 120,000 hairs on their scalp. That number does not suddenly disappear.

What often changes is more subtle:

• Strands may grow slightly finer

• Growth cycles may feel shorter

• Certain areas may appear lighter

• Hair may not feel as full in a ponytail

Even a 10–20% shift in density can feel significant.

Hair evolves gradually. Awareness helps you respond thoughtfully instead of react emotionally.

Medical Treatments and the Anagen Phase

Some treatments are designed to support or extend the growth phase.

Topical minoxidil is one of the few treatments approved by the U.S. Food & Drug Administration (FDA) for certain types of hair loss. Consistent use may support hair regrowth in some individuals, particularly in cases of pattern thinning. Results vary depending on genetics, health, and timing within the hair growth cycle.

While medical treatments can play a role for some women, long-term hair health is rarely one-dimensional. Scalp condition, stress levels, lifestyle, and hair care habits all influence how hair behaves over time.

Hair growth is layered — not linear.

How to Support the Anagen Phase Naturally

While genetics influence your hair cycle, supportive habits matter.

Scalp Health

Healthy hair begins at the scalp. Clean, balanced skin creates a better environment for growth.

Circulation

Gentle massage and overall wellness habits can support nourishment to the follicle.

Nutrition

Hair is built from protein. Iron, vitamin D, zinc, and B vitamins all contribute to healthy growth cycles.

Stress Awareness

Long-term stress can influence how long hair remains in its active growth phase.

Strategic Hair Design

Thoughtful cutting and color placement can create the appearance of fuller, more balanced density — without overwhelming fragile areas.

Why Anagen Artistry Focuses on Growth-Based Hair Design

The name Anagen Artistry reflects a philosophy rooted in growth.

Located in Southwest Portland, Oregon, Anagen Artistry is a boutique hair salon specializing in:

• Custom color design

• Density-aware haircuts

• Fine hair refinement

• Long-term hair health awareness

We don’t approach hair as a one-time service. We consider:

• Growth patterns

• Density distribution

• Lifestyle

• Maintenance reality

• Future evolution

Because healthy hair isn’t just about how it looks today — it’s about how it continues to evolve.

If you’re navigating hair changes in your 30s or 40s and want a thoughtful, informed approach in our area in Portland, education is the first step and having a stylist that understand the change please reach out to www.anagenartistry.com.

Growth begins with understanding.