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The only nutraceutical accepted by the AHA
100% Money back Guarantee
Liquid Vitamin D3 Nutraceutical
Liquid Vitamin D3 Nutraceutical
Liquid Vitamin D3 Nutraceutical
Liquid Vitamin D3 Nutraceutical

*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

Liquid Vitamin D3 Nutraceutical American Hair Loss Association Seal

High-potency, bioavailable D3 to support immune balance, hormonal health, and hair follicle vitality.

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

This easy-to-absorb liquid formula delivers 5,000 IU of premium-quality vitamin D3 in every dropper—an essential nutrient for hair growth, immune regulation, and overall wellness. Delivered in a base of MCT oil for enhanced absorption, it's especially helpful for individuals with digestive sensitivities or anyone who prefers not to take capsules.

Delivery every 3 months
Delivery every 6 months

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Supplement Facts

Discounted
fast shipping

Only Nutraceutical
Accepted by the AHA

Money Back
Guarantee

Supplement Facts American Hair Loss Association Seal

Featured in:

As Featured In
Liquid Vitamin D3 Nutraceutical

Liquid Vitamin D3 Nutraceutical

$74.85 $24.95
$24.95 $21.21

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

Helps Correct Vitamin D Deficiency

Vitamin D deficiency is common and can quietly disrupt hair growth cycles. This formula helps replenish optimal levels to support long-term regrowth.

Supports Hormonal & Thyroid Health

Vitamin D plays a key role in balancing androgens and supporting thyroid function—both critical for addressing DHT-related hair thinning.

Encourages a Healthy Immune Response

Promotes immune system balance and supports a scalp environment more favorable for healthy hair growth.

Liquid Delivery for Better Absorption

No capsules or tablets—just one daily dropper delivers fast-acting, bioavailable support you can feel.

Ingredients

Vitamin D3 (Cholecalciferol) MCT Oil (Medium Chain Triglycerides)

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

Take 5 drops daily under the tongue or as directed by your healthcare provider.
For Best Results: Use consistently for a minimum of 3-4 months.

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 Biotin and does it matter in treating hair loss?

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

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

Customer Reviews

20,000+ People Have Seen
Life-Changing Results

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