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Approved By Professionals
Rated 'Excellent' 4.9 / 5.0
The 90 Day Groh System
The only hair growth system that contains Ergothioneine: a unique ingredient that your body has receptors for but can't product on it's own.
Targets Hair Loss at Root Cause
More Visible Thickness & Growth
Powered by Ancient Ingredients
Healthy pH Balance
Powered by Science
For best results, use all three products daily. Results build with consistency most people see a visible difference by day 60.
Targets Root Cause
Clinically Studied Ingredients
90 Day Guarantee
About the Groh System
The Groh System is a three part daily ritual designed to grow hair from the inside out. Your supplement delivers ergothioneine one of the most powerful antioxidants for follicle health along with targeted nutrients that fill the gaps your body needs to prioritize hair growth. Your scalp serum feeds follicles directly with growth promoting actives rooted in Japanese, Indian, and African hair traditions. Your shampoo reinforces both, keeping your scalp clean, balanced, and receptive.
Used together, every single day, they create the conditions your hair needs to actually grow.
Clinically studied ingredients for follicle health
Rooted in traditions used for thousands of years
Vegan, clean formula no fillers
Ingredients
Supplement Ergothioneine A naturally occurring amino acid found in mushrooms and shown to protect hair follicles from oxidative stress one of the leading drivers of hair thinning. Ergothioneine supports follicle longevity and creates the internal environment your body needs to sustain healthy hair growth over time.
Scalp Serum Amla (Indian Gooseberry) Used in Ayurvedic hair care for over 3,000 years, amla is one of the richest natural sources of Vitamin C and has been shown to strengthen hair at the root, reduce breakage, and stimulate follicle activity. A tradition that Western markets are only beginning to catch up to.
Scalp Serum Black Seed Oil Sourced from Nigella sativa, black seed oil has been a cornerstone of hair and wellness traditions across West Africa and the Middle East for centuries. Rich in thymoquinone, it promotes scalp circulation, reduces inflammation, and supports a healthy environment for new growth.
Shampoo Rice Water Extract A centuries old Japanese beauty ritual rice water contains inositol, a carbohydrate that penetrates damaged hair to repair it from within and reduce surface friction. Used consistently, it contributes to noticeably stronger, thicker looking hair over time.
Every product in the Groh System is vegan, free from sulfates and fillers, and made with purposeful doses of ingredients your hair has actually been waiting for.
How to Use the Groh System
Take 2 supplement capsules daily, ideally with a meal for best absorption.
Take 2 supplement capsules daily, ideally with a meal for best absorption.
Use the shampoo 3 to 4 times per week, leaving it on for 2 to 3 minutes before rinsing to allow active ingredients to penetrate.
Log your daily routine in the Groh tracking app and take your weekly photo. Consistency compounds most women notice the first visible changes between days 30 and 60.
Shipping & Returns
Fast delivery in 3 to 5 business days. Free shipping on subscriptions and orders over $75.
Not seeing results? Our 90 day money back guarantee means you can try the full system risk free. If your hair isn't noticeably different, we'll make it right no questions asked.
Approved By Professionals
Works Faster Than Any Single Product Alone.
Our the 3-part system works to create compounding results with every use.
1
Inside (supplement)
feeds your follicles from within
2
Outside (serum)
activates growth at the scalp
3
Daily (shampoo)
reinforces every wash
Together = compounding results faster than any single product alone
Ready to See the Shift?
A system that works with your body. Not against it.
Day 1 to 7
The Foundation
Your supplement starts filling nutritional gaps your body has been using to deprioritize hair growth. Your scalp serum begins delivering active ingredients directly to your follicles. The ritual starts here.
Day 30
Early Signals
Most women notice reduced shedding first. Your scalp feels healthier. Hair that was breaking looks and feels stronger. The system is working even if you can't fully see it yet.
Day 60
Visible Change
This is where most women see it in photos for the first time. New growth along the hairline or part. Increased density. The difference between what was there before and what's growing now becomes visible.
Day 90
The System Locks In
With consistent daily use, results stabilize into a new baseline. Thicker, stronger hair with less shedding maintained through a single daily ritual that takes under five minutes.
Ingredients That Just Do More
1/3 Ergothioneine
The internal driver your follicles have been missing
Ergothioneine is a rare amino acid naturally synthesized by certain fungi and concentrated in your hair follicles where it acts as a powerful antioxidant shield. When levels drop (due to stress, poor diet, or age), follicles become vulnerable to oxidative damage, and growth slows or stops. Groh's supplement delivers an effective daily dose to restore that protection.
of users reported reduced hair shedding at 90 days
noticed improved hair thickness vs. baseline photos
said they would recommend the system to a friend
2/3 Amla + Black Seed Oil
Traditions that outlasted every beauty trend
Amla has been central to Indian hair ritual for millennia. Black seed oil has been documented in African and Middle Eastern wellness practices for over 2,000 years. Both deliver measurable benefits for follicle stimulation, scalp inflammation reduction, and hair shaft strength and both are ingredients the American market has largely overlooked until now.
reported a healthier, less irritated scalp within 30 days
noticed stronger hair with less breakage
said their scalp felt noticeably different after 60 days
3/3 Rice Water Extract
Ancient Japanese secret. Modern result.
Japanese women have rinsed their hair with fermented rice water for centuries a practice linked to some of the longest, strongest hair in the world. Inositol, the key compound in rice water, is one of the only ingredients shown to penetrate inside the hair shaft and repair it from within not just coat it.
noticed less breakage and improved smoothness within 4 weeks
said their hair felt thicker and more resilient overall
said the shampoo was unlike anything they had used before
Why Women Are Sticking With Groh
Support that works from the inside out and shows up in the mirror.
"I was losing so much hair in the shower that I started dreading washing it. By week six on Groh, it was noticeably less. By day 90 I wasn't scared to run my fingers through my hair anymore."
Maya T.
Verified Customer
Hair Shedding
March 2025
"I thought the shedding was just something I had to live with in my 30s. I had no idea it was connected to what I was (or wasn't) eating. The supplement alone changed things. Adding the serum made it even better."
Rachel K.
Verified Customer
Less Shedding
April 2025
"Three months in and I genuinely cannot believe how different my brush looks after styling. I didn't realize how much I had normalized losing that much hair every day."
Danielle W.
Verified Customer
Real Results
February 2025
"I was skeptical that a supplement could affect shedding. I was wrong. Within 45 days I could see a difference. Now I'm on my second system and I won't stop."
Serena L.
Verified Customer
Converted
May 2025
Frequently Asked Questions
Straight answers about building a ritual that actually grows your hair.
How does the Groh System work?
Groh works as a three part system: your supplement fills the internal nutritional gaps that cause your body to deprioritize hair growth, your scalp serum delivers growth promoting actives directly to your follicles, and your shampoo reinforces both by keeping your scalp clean and balanced. Used together every day, they create the conditions your hair needs to grow which no single product can do alone.
When will I start seeing results?
Most women notice reduced shedding within the first 30 days. Visible thickness and growth typically appear between days 45 and 60. The most dramatic results happen at 90 days which is why we recommend completing the full system before drawing conclusions. The daily tracking app makes it easy to see your progress week by week.
Why do I need all three products? Can I just use one?
You can but you'll see a fraction of the results. Each product targets a different part of the growth cycle. The supplement works internally. The serum works at the follicle. The shampoo maintains the environment both depend on. Separating them is like running an engine on one cylinder.
What makes the ingredients different from other brands?
Most hair growth products rely on biotin and basic scalp stimulants that have been on the American market for decades. Groh uses ingredients like ergothioneine, amla, black seed oil, and rice water extract ingredients with thousands of years of documented use in some of the world's most hair rich cultures, and increasingly validated by modern research. Most American brands haven't caught up yet.
Is it safe for daily use?
Yes. Every ingredient in the Groh System is vegan, clean, and formulated for daily use. There are no harsh chemicals, fillers, or artificial additives. If you are pregnant, nursing, or on medication, check with your healthcare provider first.
What is the 90 day tracking app?
The free Groh tracking app lets you log your daily supplement, serum, and shampoo use, and take a weekly photo of your most affected area. Over 90 days, it creates a side by side visual record of your progress so you can see the difference with your own data, not just someone else's before and after.
What if it doesn't work for me?
We back the system with a 90 day money back guarantee. If you complete the full 90 days consistently and don't see a difference, contact us and we will make it right. No hoops. No hassle.
Is the vibrating comb actually useful or just a gift?
It's genuinely useful. Vibration at the scalp increases circulation to hair follicles, which supports better absorption of the serum and stimulates the follicle environment directly. We include it because it works and because it makes the daily ritual feel like something worth doing.
Targets Root Cause
Clinically Studied Ingredients
90 Day Guarantee
Free Tracking App Included
How Groh Crushes Every Other Option
We built this system because nothing else does all of this. By far.
Treats internal + external cause
Ingredients rooted in global hair traditions
Ergothioneine for follicle protection
3 part system that works together
No fillers, no artificial additives
90 day money back guarantee
4.9 / 5.0 from 2,000+ verified reviews
Groh
System
other
Rarely
Groh Is Different From Everything You've Tried
Backed by science. Rooted in tradition. Built for real results.
The Inside Out Model
Other brands treat the symptom. We treat the system. Your hair grows or stops growing based on what's happening inside your body. We built Groh to address both layers at once, because that's the only approach that actually works
Ingredients From Everywhere Hair Has Always Been Beautiful
Japanese rice water. Indian amla. West African black seed oil. These traditions didn't last thousands of years by accident. We brought them into one daily system because the proof was already there the American market just hadn't paid attention.
You Track It. You Own It.
Every Groh order comes with access to our 90 day tracking app. Daily logging. Weekly photos. Your own data showing your own results. We believe the most powerful proof isn't a before and after from a stranger. It's yours.
See Why Women Don't Stop Using Groh
Based on 2,000+ verified customer reviews
"I have tried everything. Biotin, castor oil, expensive treatments. Nothing moved the needle the way Groh did. I'm on my third system and my hair is the thickest it's been in ten years."
Lena R.
Verified Customer
Less Shedding
Visible Thickness
"Day 63 and my hairline is filling in. I have photos. I cry every time I look at them. I did not think this was possible for me."
Camille T.
Verified Customer
New Growth
Hairline Restored
"The serum alone changed my scalp completely. I didn't realize how much scalp health was connected to everything else until I started using Groh."
Imani B.
Verified Customer
Scalp Transformed
Less Breakage
"My stylist noticed before I said anything. She asked what I changed. That was around day 55. I've been on Groh ever since."
Whitney S.
Verified Customer
Stylist Approved
Real Density
"The tracking app is the thing that kept me going. Seeing week 4 next to week 8 made me understand that it was working even when I was being impatient."
Fatima A.
Verified Customer
App Kept Me Consistent
Results at Day 60
"I was losing hair after having my second child and I felt desperate. Groh didn't promise miracles it just consistently did what it said it would. I'm so grateful."
Natalie P.
Verified Customer
Postpartum
System That Delivered
"There is something different about using ingredients that have worked for thousands of years. It feels more trustworthy than whatever the latest biotin formula is."
Anika D.
Verified Customer
Ancient Ingredients
Long Term Trust
"I took 90 day photos every week. By day 45 I was a believer. By day 90 I was sending this to every woman I know."
Jade M.
Verified Customer
Converted at Day 45
Telling Everyone
"The vibrating comb felt like a gimmick. It is not a gimmick. My scalp is different. My absorption is different. The whole routine feels premium in a way I didn't expect."
Serena C.
Verified Customer
Comb Is the Secret Weapon
Ritual Feels Good
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