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+ In Clinic Consultation with William Gaunitz - Carlsbad CA
In Clinic Consultation with William Gaunitz Physician Reviewed Trichologist developed 100% Money back Guarantee
Zone 1TM

In Clinic Consultation with William Gaunitz

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In Clinic Consultation with William Gaunitz

In Clinic Consultation with William Gaunitz

100% No-Risk. Within 90 Days. Money Back Guarantee.

As featured in:

Vogue, SHAPE, Byrdie, Modern Living with Kathy Ireland, The Knot and Inc.
What to expect

90 days to better hair.
Here's what happens.

Day 1–30
Day 31–60
Day 61–90

The foundation Nutritional gaps start closing. Shedding begins to slow as follicles receive the nutrients they've been missing.

The shift Shedding reduces noticeably. Scalp health improves and dormant follicles begin re-entering the growth phase.

The result Less shedding. Fuller, stronger hair — and 75% of users report shedding has stopped complete

Understanding The Science

Your scalp is missing something.
FoliGROWTH® knows exactly what.

Hair loss isn't random — it maps to specific zones on the scalp, each with a distinct root cause. FoliGROWTH® is formulated to target Zone 2, where nutritional deficiencies silently starve follicles and trigger excessive shedding.

Zone 1TM
Hormonal Hair Loss DHT is quietly shrinking your follicles.
Zone 2TM
Nutritional Hair Loss Your follicles are starving for nutrients.
Zone 3TM
Inflammatory Hair Loss Scalp irritation blocks the growth cycle.
Zone 1™ · Hormonal

Your follicles are
shrinking. And you don't know it.

Testosterone can convert into DHT, which can bind to susceptible hair follicles and gradually shorten the growth cycle — leading to finer, weaker strands and visible thinning, especially at the temples and crown.

83% Reported and noticed hair regrowth.¹
Hormonal hair loss: thinning at the crown and hairline
Zone 2™ · Nutritional

Your follicles are
starving. And you don't know it.

Deficiencies in key vitamins, minerals, and nutrients can disrupt the hair growth cycle, leading to increased shedding, diffuse thinning, and weaker growth. Correcting these nutritional gaps helps create the foundation follicles need to grow normally.

85% Reported a reduction in shedding.¹
Nutritional hair loss: diffuse thinning throughout
Zone 3™ · Inflammatory

Your follicles are
irritated. And you don't know it.

When the scalp becomes irritated — from stress, immune responses, or product buildup — blood flow to follicles is restricted and the growth cycle breaks down. Calming botanicals and targeted nutrients help restore a healthy scalp environment where hair can grow.

89% Recommended to family and friends.¹
Inflammatory hair loss: patchy shedding across the scalp

Not sure if this product is right for you?

Take the Zone Hair Loss Test

Real results.
Don't take our word for it.

Real before-and-afters from real HairStem™ users — at 60, 90 and 180 days. No filters. No retouching.

Before and after: a man’s front hairline, from thinning temples to fuller hair

“Hair loss is stressful, scary, and heartbreaking so I wanted to provide an early review so others, like myself, can have a bit of a sigh of relief. I’m happy with my experience.

Regrowth Visible 180-Day Journey Denser Roots
Regrowth Visible

New strands coming in where hair had stopped growing.

180-Day Journey

Stayed consistent and the results were worth every day.

Denser Roots

Hair growing back fuller and stronger from the root up.

Before and after: a woman’s hairline and temple, from visible thinning to fuller hair

“I had tried everything and given up when I found Advanced Trichology. At first I thought nothing was happening, but I stuck to the plan and my hair actually grew back!”

Regrowth Visible 180-Day Journey Denser Roots
Regrowth Visible

New strands coming in where hair had stopped growing.

180-Day Journey

Stayed consistent and the results were worth every day.

Denser Roots

Hair growing back fuller and stronger from the root up.

Before and after: the top of a woman’s head, from a widening part to denser hair

“My confidence took a hit when my hair started thinning, but sticking with the plan changed everything. My scalp isn’t showing anymore, and my hair looks strong and full.”

Regrowth Visible 180-Day Journey Denser Roots
Regrowth Visible

New strands coming in where hair had stopped growing.

180-Day Journey

Stayed consistent and the results were worth every day.

Denser Roots

Hair growing back fuller and stronger from the root up.

Before and after: the top of a man’s head, from a thinning crown to denser hair

“I was losing confidence along with my hair, but after a few months on the Advanced Trichology routine, I started seeing new growth. My before-and-after photos still surprise me.”

Regrowth Visible 180-Day Journey Denser Roots
Regrowth Visible

New strands coming in where hair had stopped growing.

180-Day Journey

Stayed consistent and the results were worth every day.

Denser Roots

Hair growing back fuller and stronger from the root up.

Customer Reviews

Overall rating: 5.0 / 5 from 7 reviews.

I saw Dr Gaunitz for an in clinic consultation and I am impressed by his breadth of knowledge and expertise. He was able to pinpoint the root cause of the problem when another trichologist and my derma couldn’t. He said that my emotional trigger turned into a chemical trigger because I’ve been taking too many supplements for my condition. He outlined a comprehensive care plan that targets all the areas and I’m confident that this time, it’s going to finally work. I’ve already applied the changes he recommended and I can’t wait to see the results.

Camille O. 5/5

In Clinic Consultation with William Gaunitz

I saw Dr Gaunitz for an in clinic consultation and I am impressed by his breadth of knowledge and expertise. He was able to pinpoint the root cause of the problem when another trichologist and my derma couldn’t. He said that my emotional trigger turned into a chemical trigger because I’ve been taking too many supplements for my condition. He outlined a comprehensive care plan that targets all the areas and I’m confident that this time, it’s going to finally work. I’ve already applied the changes he recommended and I can’t wait to see the results.

Camille O. 5/5 Verified

In Clinic Consultation with William Gaunitz

Dr is very thorough and truly cares about solving your hair loss problems. He has a vast amount of knowledge and I feel really confident in this diagnosis

Mary D. 5/5 Verified

In Clinic Consultation with William Gaunitz

Why it works

Everything your hair needs.
Nothing it doesn't.

Every ingredient in FoliGROWTH® has a clinical purpose, from supporting thyroid and adrenal function to feeding follicles the vitamins and minerals they need to grow.

28 active ingredients

A therapeutic blend of vitamins, minerals, and herbs — formulated at clinical strength.

100% natural formula

No synthetic fillers. Every ingredient has a clinical purpose.

In Clinic Consultation with William Gaunitz
Patented formula

Developed and refined over 20+ years of clinical trichology research.

90 vegetable capsules

One daily serving designed for maximum absorption and bioavailability.

Supports thyroid & adrenal function

Beyond the follicle — FoliGROWTH® supports the systems that regulate hair growth at the hormonal level.

Quick Start Bundles

Men 18-29
Men 18 - 29 Hair Growth Bundle
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Men 30+
Men 30+ Hair Growth Bundle
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Women 18-34
Women 18 - 34 Hair Growth Bundle
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Women 35-49
Women 35 - 49 Hair Growth Bundle
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Women 50+
Women 50+ Hair Growth Bundle
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Real results,
Don't take our word for it.

+2,120 people tried FoliGROWTH® and documented what happened. Here's what they found.

Woman’s hairline and temple before treatment, with visible thinning Before
The same woman’s hairline after treatment, with fuller hair After 90 days

“I had tried everything and given up when I found Advanced Trichology. At first I thought nothing was happening, but I stuck to the plan and my hair actually grew back!”
 

Man’s receding front hairline before treatment Before
The same man’s front hairline after treatment, with fuller hair After 180 days

“Hair loss is stressful, scary, and heartbreaking so I wanted to provide an early review so others, like myself, can have a bit of a sigh of relief. I’m happy with my experience.

Before and after 90 days: the crown of a man’s head, top-down, thinner before and denser after

“I was losing confidence along with my hair, but after a few months on the Advanced Trichology routine, I started seeing new growth. My before-and-after photos still surprise me.”
 

Before and after 90 days: the top of the head, thinner before and denser after

“My shedding slowed down first, then I noticed baby hairs coming in. It’s the first time in years I feel hopeful about my hair.”

Before and after 90 days: the crown of a man’s head, top-down, thinner before and denser after

“I used to avoid bright lighting because my scalp showed so much. Now my hair looks fuller and healthier, and friends keep asking what I changed.”

Before and after 90 days: the crown of a man’s head, top-down, thinner before and denser after

“I followed the plan exactly and the results were worth it. My hair feels stronger, my part looks smaller, and I finally see real regrowth.”

Before and after 90 days: the crown of a man’s head, with a visible thin spot before and more coverage after

“I bought the products out of desperation, but they exceeded my expectations. My hair is thicker, my scalp feels better, and my confidence is up.”

Before and after 90 days: the crown of a man’s head, with a visible bald patch before and more coverage after

“I could see my hair thinning in photos, which was heartbreaking. After sticking with Advanced Trichology for a few months, the change has been dramatic.”

Before and after 90 days: the top of the head from the side, thinner before and fuller after

“My stylist noticed the improvement before I did. She said my hair looked fuller and healthier — and now I can see the difference in every picture.”

Before and after 90 days: the crown of a man’s head, mostly bald before and with more hair after

“I wasn’t expecting fast results, but consistency really paid off. My hair is growing again, and my scalp isn’t irritated anymore.”

Before and after 90 days: the front and top of a man’s curly hair, thinner before and fuller after

“The transformation has been incredible. I went from visible thinning to a fuller head of hair, and I’m more confident going out without hats.”

Before and after 90 days: the top of a woman’s head, with a widening part before and fuller hair after

“I was skeptical because I’d tried so many things, but this is the first routine that made a visible difference. My hair looks fuller and feels healthier than it has in years.”

Before and after 180 days: the crown of a man’s head, top-down, thinner before and denser after

“I used to dread washing my hair because of how much I’d lose. Now the shedding has slowed down, and I’m actually seeing new growth in the spots that worried me the most.”

Before and after 180 days: the top of a man’s head, with a thin patch before and more coverage after

“I didn’t expect my before-and-after photos to look this different. My hair feels thicker, my part has filled in, and I finally feel like myself again.”

Before and after 180 days: the top of a woman’s head, with a visible part before and denser hair after

“My confidence took a hit when my hair started thinning, but sticking with the plan changed everything. My scalp isn’t showing anymore, and my hair looks strong and full.”

Before and after 90 days: the front and top of a man’s head, thinner before and fuller after

“I had patchy thinning around my temples, and now those areas are filling back in. It feels amazing to finally see progress.”

Before and after 90 days: a man’s front hairline, thinning before and fuller after

“My thinning was getting worse every month, and it really scared me. After staying consistent, I started seeing small improvements that turned into big ones.”

Before and after 180 days: a man’s receding temple, thinner before and fuller after

“I kept seeing progress month after month — less shedding, healthier strands, and now actual regrowth. I’m honestly thrilled with the results.”

Regrow the
true you. Start your journey
William Gaunitz, trichologist and founder of Advanced Trichology
Advanced Trichology® Founder

20 years of research.
One formula that works.

William Gaunitz, WTS, spent over two decades studying why hair falls out — and more importantly, how to stop it. His clinical research identified three root causes of hair loss: hormonal, nutritional, and inflammatory. HairStem™ is the direct result of that work — not a trend product, but a clinically developed formula tested across thousands of real patients.

Read More

Today, Advanced Trichology is a globally known brand and has successfully helped thousands overcome hair loss.

William Gaunitz Advanced Trichology® Founder

FAQs

The science, simplified.

Real answers to the questions your doctor probably hasn't had time to explain.

What is Biotin? Does it matter in treating hair loss?

Question and Answer: Biotin for hair loss? Does it matter?

What is Telogen Effluvium? How can we fix it fast for hair regrowth?

Telogen Effluvium Hair Loss - What is it? How To Fix It Fast

How do nutrients, or lack thereof, impact hair growth?

Nutritional Hair Loss - How Does It Work?

Is age a factor in hair regrowth?

Is Age a Factor in Hair Regrowth? Reserving Age Related Hair Fast With William Gaunitz

How did Advanced Trichology develop this system?

Natural Solution Of Hair Regrowth - Kathy Ireland Featuring William Gaunitz WTS

Does this treatment work for Women?

Hair Loss Treatment for Women with Advanced Trichology

Does this treatment work for Men?

Hair Loss Treatment for Men with Advanced Trichology