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The only nutraceutical accepted by the AHA
100% Money back Guarantee
HairStem Serum
HairStem Serum
HairStem Serum
HairStem Serum
HairStem Serum
HairStem Serum
HairStem Serum
HairStem Serum
HairStem Serum
HairStem Serum

*of the women polled (128 people polled, 102 were women)

83%

Noticed Hair Regrowth*

85%

Noticed a Reduction in Shedding*

89%

Recommend to Friends & Family*

Zone 2TM

HairStem Serum American Hair Loss Association Seal

Targeted topical nutrition to support hair density, scalp health, and stronger strands.

The First and Only Nutraceutical Brand Accepted by the American Hair Loss Association

Crafted in hair loss clinics, our natural formula maximizes follicular performance for both men and women. Key vitamins and extracts combat DHT, a hormone linked to hair thinning on the scalp. A blend of potent essential oils, herbal extracts, and tri-salts enhances nutrient delivery to the scalp, crucial for the hair growth cycle and reactivating dormant follicles. Additionally, our vitamin, essential oil, and herbal combination target reactive oxygen species (ROS) and other inflammatory pathways associated with hair thinning.

Delivery every 30 days
Delivery every 45 days
Delivery every 60 days

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3-month supply
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Supplement Facts

Free Fast
Shipping

Only Nutraceutical
Accepted by the AHA

Money Back
Guarantee

Supplement Facts American Hair Loss Association Seal

Featured in:

As Featured In
HairStem Serum

HairStem Serum

$149.85 $49.95
$49.95 $42.46

100% No-Risk. Money Back Guarantee.

Real results,
trusted by thousands.

Through personalized Advanced Trichology treatments, thousands have achieved real hair growth—even after everything else failed.

Before
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!”
 

Before
After 90 days

“Everywhere I go people cannot believe how great that my hair looks and how much thicker that it's grown back because it fell out to literally you can see my scalp and I was so embarrassed.”

Before
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.

Product Details

Key Benefits

Triple-Action Follicle Support

Targets hormonal, nutritional, and inflammatory factors of hair loss to improve density and fullness.

DHT Defense at the Scalp

Helps inhibit DHT locally to reduce thinning and protect vulnerable follicles.

Nutrient-Rich Formula

Delivers vitamin D3, minerals, antioxidants, and botanicals directly to the scalp to reactivate dormant follicles and support the growth cycle.

Scalp Protection & Balance

Strengthens follicle resilience while calming inflammation and oxidative stress from hormones, chemicals, and UV exposure.

Ingredients

Glycerin Black Cohosh Extract Gotu Kola Extract Alzelaic Acid Tea Tree Oil Panthenol Japanese Green Tea Extract
Grapefruit Seed Extract Neem Oil Vitamin D3 Tri-Salts (Calcium, Magnesium, Potassium) Sage Essential Oil Rosemary Essential Oil Ylang Ylang Essential Oil Lavender Essential Oil Wild Red Thyme Essential Oil Alcohol Denat (SDA 40 Alcohol)

Understanding The Science

This Product Targets Zone 2 Hair LossTM

Not sure if this product is right for you?

Take the Zone Hair Pull Test™

At Advanced Trichology, we’ve identified three scientifically validated root causes of hair thinning: hormonal (DHT), nutritional deficiencies, and inflammation. These underlying causes show up in predictable zones on the scalp, allowing us to pinpoint the true source of your hair loss—and treat it with precision.

Zone 1TM
DHT Hair Loss

When testosterone is converted into DHT (dihydrotestosterone), it can shrink follicles and shorten the hair growth cycle. This hormonal imbalance is most often seen at the temples and crown—and is the leading cause of hair loss in both men and women. Our DHT-focused solutions help block this conversion and protect follicles over time.

Zone-Specific Benefit Studies

Digestive Health

Williams, Robertson, Steel, 2024

Gut Barrier Integrity

Henderson, Li, Truong, 2025

Gut Immune Axis

Shcnetz, Erickson, Wallace, 2025

Cardiovascular Health

Evans, Nguyen, Fernande, 2024
Zone 2TM
Nutritional Hair Loss

Lack of essential vitamins and minerals like iron, D3, and biotin can silently starve hair follicles—leading to excessive shedding and slow regrowth. Nutritional deficiencies are often reflected in thinning along the sides and back of the scalp. Our targeted nutraceuticals are designed to restore these critical nutrients at clinical strength.

Zone-Specific Benefit Studies

Digestive Health

Williams, Robertson, Steel, 2024

Gut Barrier Integrity

Henderson, Li, Truong, 2025

Gut Immune Axis

Shcnetz, Erickson, Wallace, 2025

Cardiovascular Health

Evans, Nguyen, Fernande, 2024
Zone 3TM
Inflammatory Hair Loss

Scalp imbalance can disrupt healthy hair growth at the root. When the scalp becomes irritated—due to stress, immune changes, or product buildup—it can reduce blood flow and compromise follicle health, leading to shedding or thinning. At Advanced Trichology, we address this using a combination of calming botanicals, probiotics, and targeted nutrients that help support your body’s natural inflammatory and immune responses—both topically and internally—to promote a healthier scalp environment.

Zone-Specific Benefit Studies

Digestive Health

Williams, Robertson, Steel, 2024

Gut Barrier Integrity

Henderson, Li, Truong, 2025

Gut Immune Axis

Shcnetz, Erickson, Wallace, 2025

Cardiovascular Health

Evans, Nguyen, Fernande, 2024

How to use

  • Apply 1-2 mL (1 dropper equals 1 mL) directly to the areas of hair loss on the scalp.
  • Massage into the scalp and let sit overnight.
  • Recommended to be used at least once daily.
  • SHAKE VIGOROUSLY PRIOR TO EACH APPLICATION.

Join thousands taking charge
of their hair growth experience

Lydia
Zone 2TM
Zone 3TM
Drea

DHT Blocker, FoliGROWTH and Derma-IRON

Aubrie
Zone 2TM
Andrea

FoliGROWTH, Derma-IRON and HairStem DHT Blocker Shampoo

Susan
Zone 2TM
Zone 3TM
Rachael

FoliGROWTH, Derma-IRON and HairStem DHT Blocker Conditioner

Lindsey
Zone 2TM
Zone 3TM
Lindsey C.

DHT Blocker, FoliGROWTH, NutraM and FoliGROWTH Serum

Lydia
Zone 2TM
Zone 3TM
Drea

DHT Blocker, FoliGROWTH and Derma-IRON

“Your products are amazing. You saved my life, and you saved my confidence—I finally feel like myself again. I’ve tried so many things over the years, but nothing worked like this. I tell everyone about it.”

The Solution:
Rx
DHT Blocker with Immune Support
daily
/
+
nightly
Rx
FoliGROWTH Ultimate Hair Nutraceutical
+
daily
Rx
Derma-IRON
for Hair Growth
+
daily
Zone 2TM
Aubrie
Zone 2TM
Andrea

FoliGROWTH, Derma-IRON and HairStem DHT Blocker Shampoo

“This was the only product that made a noticeable difference. My hair started to come in fuller, thicker, and healthier—and I could feel it. I’m so thankful to have found something that actually works.”

The Solution:
Rx
FoliGROWTH Ultimate Hair Nutraceutical
+
daily
Rx
Derma-IRON
for Hair Growth
+
daily
Rx
HAIRSTEM DHT Blocking Shampoo
quarter-sized to wet scalp
daily
Zone 2TM
Susan
Zone 2TM
Zone 3TM
Rachael

FoliGROWTH, Derma-IRON and HairStem DHT Blocker Conditioner

“I've taken FoliGROWTH every day for five months, and the bald spot is almost completely grown back. I cannot recommend this product enough—this has completely changed the way I feel about myself. It's a total confidence booster.”

The Solution:
Rx
FoliGROWTH Ultimate Hair Nutraceutical
+
daily
Rx
Derma-IRON
for Hair Growth
+
daily
Rx
Scalp Therapy Conditioner
to scalp & massage for 1–3 min
daily
Zone 2TM
Maria
Zone 2TM
Zone 3TM
Lindsey C.

DHT Blocker, FoliGROWTH, NutraM and FoliGROWTH Serum

“It was great finding something that works and knowing it was specialized for me.”

The Solution:
Rx
FoliGROWTH Ultimate Hair Nutraceutical
+
daily
Rx
DHT Blocker with Immune Support
daily
/
+
nightly
Zone 2TM

Quick Start Bundles

Men 18-29
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Men 30+
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Women 18-34
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Women 35-49
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Women 50+
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FAQs

Hair health is whole
body health.

Frequently asked question about hairloss

Find Your Reason for Hair Loss
What is the best way to block DHT For women's hair growth?

What Is The Best Way To Block DHT For Women Hair Growth - William Gaunitz

What is DHT and what is the best way to block DHT for men?

DHT Blocker for Hair Growth: Best DHT Blockers for Hair Loss and Best Results from Top Trichologist

Polycystic Ovary Syndrome (PCOS) and hair loss: What are the causes, treatments, and effects?

PCOS Hair Loss and how to fix it: Polycystic Ovarian Syndrome Hair Loss: Cause, Treatment, Effects

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?

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

Does this treatment work for Men?

Hair Loss Treatment for Men with Advanced Trichology

Customer Reviews

20,000+ People Have Seen
Life-Changing Results

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