The Science Behind Hair Growth: Understanding the Hair Growth Cycle
The Science Behind Hair Growth: Understanding the Hair Growth Cycle

Hair loss affects millions of people worldwide—yet most individuals don’t fully understand how hair grows, why it sheds, or what can disrupt the natural growth cycle. Whether you’re starting to notice thinning hair or experiencing more advanced hair loss, understanding the science of hair growth is the first step toward restoring your confidence.

At B Medical Spa Hair Restoration in San Diego, led by the trusted and experienced Dr. Nadine Haddad, we’re passionate about helping clients discover cutting-edge, science-backed solutions for hair restoration. Our clinic offers PRP Hair Restoration and TED Hair Restoration, both of which are designed to reinvigorate the hair growth cycle and produce long-lasting results.

We proudly welcome clients from Bankers Hill, Chula Vista, Coronado, Del Mar, Encinitas, Eucalyptus Hills, Hillcrest, Lemon Grove, Mission Hills, Poway, Solana Beach, University City, and surrounding areas who are ready to take the next step toward fuller, healthier hair.

What Is the Hair Growth Cycle?

The hair growth cycle is a continuous, natural process that involves three main phases: Anagen (growth phase), Catagen (transition phase), and Telogen (resting/shedding phase). Each strand of hair on your scalp is in a different phase at any given time, which is why you don’t lose all your hair at once.

Let’s take a closer look at each phase:

1. Anagen Phase (Growth Phase)

  • Duration: 2 to 7 years
  • Activity: Hair actively grows from the root (follicle)
  • Percentage of hair in this phase: 80-90%

The anagen phase is the most important part of the cycle for people interested in hair restoration, as it determines the length and thickness of your hair. During this phase, the cells in the root of the hair follicle divide rapidly, pushing the hair shaft up and out. A longer anagen phase results in longer hair growth.

2. Catagen Phase (Transition Phase)

  • Duration: 2 to 3 weeks
  • Activity: Hair growth stops, and the follicle begins to shrink
  • Percentage of hair in this phase: 1-2%

In the catagen phase, the hair detaches from the blood supply and stops growing. Although short, this transitional period is crucial in preparing the follicle for regeneration. During this phase, hair is referred to as a club hair and remains in the follicle, waiting to be pushed out.

3. Telogen Phase (Resting/Shedding Phase)

  • Duration: 3 to 4 months
  • Activity: Hair rests and then sheds
  • Percentage of hair in this phase: 10-15%

In the telogen phase, the hair follicle remains inactive, and the club hair either stays in place or falls out naturally. This is why people typically shed 50 to 100 hairs a day—a normal part of the cycle. Once this phase ends, a new hair begins to form, restarting the anagen phase.

What Causes Hair Growth Disruption?

While the hair growth cycle is natural, various factors can disrupt it, causing more hair to enter the telogen (shedding) phase prematurely. This leads to visible thinning, balding, or slow regrowth. Common causes include:

  • Hormonal imbalances (e.g., thyroid issues, menopause, PCOS)
  • Chronic stress or trauma
  • Nutritional deficiencies (iron, protein, vitamin D)
  • Autoimmune conditions like alopecia areata
  • Genetics and aging
  • Harsh hairstyles or chemical treatments
  • Postpartum or medication-induced hair loss

At B Medical Spa Hair Restoration, we address these root causes with personalized treatment plans built on medical expertise and cutting-edge technology.

PRP Hair Restoration: Reboot Your Hair Cycle Naturally

Platelet-Rich Plasma (PRP) therapy is one of the most natural and effective treatments for hair loss. It works by using your own blood plasma, which is rich in growth factors, to stimulate dormant or weakened hair follicles and restart the anagen (growth) phase.

Benefits of PRP Hair Restoration at B Medical Spa:

  • Boosts blood flow and nutrients to the scalp
  • Reactivates dormant follicles
  • Enhances hair thickness and strength
  • Reduces inflammation at the follicle root
  • Minimal downtime, non-surgical, safe for both men and women

PRP is ideal for clients dealing with early hair thinning, pattern baldness, or postpartum shedding. Dr. Nadine Haddad and her team perform PRP treatments with precision and care for maximum results.

TED Hair Restoration: The Needle-Free Innovation

For those who prefer a non-invasive, no-needle alternative, TED (TransEpidermal Delivery) Hair Restoration offers an excellent solution. TED uses ultrasound-based sound waves and air pressure to deliver potent growth-stimulating serums deep into the scalp—without pain or downtime.

Why San Diego Clients Love TED?

  • No needles, discomfort, or recovery time
  • Targets scalp health and hair density
  • Increases blood flow and follicle nutrition
  • Encourages faster hair regrowth and fullness

TED is particularly beneficial for those with sensitive skin, needle anxiety, or those who are in the early stages of hair loss.

Why Choose B Medical Spa for Hair Restoration in San Diego?

At B Medical Spa Hair Restoration, we combine medical expertise, advanced technology, and personalized care to ensure the best outcomes for our clients. Every treatment plan is tailored to your unique scalp condition, hair loss pattern, and health history.

We proudly serve clients throughout San Diego and surrounding communities, including:

Whether you’re just starting to notice thinning or you’ve struggled with hair loss for years, our team is here to help you regain your confidence and restore your natural hair growth cycle.

Conclusion: Restore Your Hair by Understanding the Science

Understanding the hair growth cycle is more than just biology—it’s the key to effective, lasting hair restoration. When you treat hair loss at the root cause, using solutions like PRP and TED hair restoration, you’re not just managing symptoms—you’re revitalizing the entire growth process.

At B Medical Spa Hair Restoration in San Diego, Dr. Nadine Haddad and her team are dedicated to helping you feel confident in your hair, your appearance, and your wellness. With innovative therapies, holistic care, and real results, we’re proud to serve clients across San Diego and beyond.

Ready to Take the First Step?

Visit B Medical Spa Hair Restoration in San Diego, California
Expert care from Dr. Nadine Haddad
We welcome clients from Bankers Hill, Chula Vista, Coronado, Del Mar, Encinitas, Eucalyptus Hills, Hillcrest, Lemon Grove, Mission Hills, Poway, Solana Beach, and University City

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