Clinically Proven Results in Just 2 Weeks · Free Shipping Available
#1 Korean Hair Care Brand for Thickening — Nielsen 2023
5 Reasons Why Dr. Groot™ Gives You Visibly Thicker, Fuller Hair Without Expensive Salon Treatments

Tired of watching your hair thin out while your bathroom shelf fills up with products that don't deliver? Discover the award-winning Korean scalp serum that reduces hair loss from breakage by 82.2% in just 2 weeks.

As Featured In

Harper's Bazaar
Women's Health
Allure
Oprah Daily
Elle

1
It Treats the Root Cause — Your Scalp — Not Just the Symptoms
Dr. Groot scalp treatment science

Most hair products coat the surface. Dr. Groot™ goes deeper. Developed by a team of scientists and dermatologists with over 50 years of research, this serum treats hair thinning at the source: an unhealthy, dehydrated scalp clogged with oil and buildup.

The roll-on formula delivers biotin, rosemary oil, caffeine and niacinamide directly where it matters — your scalp's follicles — to stop breakage and kickstart thicker, stronger regrowth.

82.2%
Reduction in hair loss from breakage*
30%
Improvement in scalp hydration*
46.4%
Reduction in scalp oil*
2 Weeks
To see clinical results*

*Based on a 2-week clinical study of 24 subjects using the full Scalp Revitalizing Solution regimen daily.

2
A 30-Second Roll-On That Fits Into Any Routine
Woman applying Dr. Groot roll-on serum

No messy droppers. No 10-step rituals. Dr. Groot's unique metal-tip roll-on lets you target thinning areas with precision — just click, roll, and massage. Use it on damp or dry hair, morning or night.

The menthol-infused gel feels refreshing and lightweight with zero stickiness, zero greasiness. Your hair looks and feels normal — just healthier, thicker, and more alive.

3 steps.
Click the cap. Roll on thinning areas. Massage in. Done.
★★★★★
"My scalp feels more conditioned, less dry and flakey. My hair looks fuller and not greasy at all. I would absolutely recommend this product — I will definitely buy it again."
Verified Buyer
✓ Verified Purchase
3
Award-Winning, Dermatologist-Tested — Not a Trend, a Proven System
Dr. Groot award-winning dermatologist-tested formula

This isn't another TikTok fad. Dr. Groot is Korea's #1 hair thickening brand backed by LG's beauty division and over 50 years of clinical research. The serum is dermatologist-tested, safe for colour-treated hair, and formulated without parabens, silicones, sulfates or gluten.

Biotin Rosemary Oil Caffeine Niacinamide Salicylic Acid Panthenol Prebiotics
No parabens · No silicones · No sulfates · No gluten

Awards & Features: Harper's Bazaar 2024 Best Scalp Treatment · Women's Health 2024 Best Thickening Shampoo · 2025 Shop TODAY Hair Awards · Featured on Good Morning America, Today Show, Kelly & Mark, InStyle, PopSugar, US Weekly, and more.

4
Celebrity Stylists Trust It — Now You Can Too
Dr. Groot trusted by celebrity hair stylists

Hollywood hairstylist Mark Townsend — the man behind the hair of Dakota Johnson, Aubrey Plaza, Mary-Kate and Ashley Olsen, and Riley Keough — uses Dr. Groot on his A-list clients. This isn't a paid endorsement buried in fine print. It's what the pros actually reach for when their clients need real results.

★★★★★
"Dr. Groot Hair Thickening Serum is a great product for people who are losing hair or have thinning hair. After consistent use, my hair looks healthier and feels thicker."
Verified Buyer
✓ Verified Purchase
5
Join Thousands of Women Who Stopped Hiding and Started Living
Woman with thick voluminous hair after using Dr. Groot

Hair thinning doesn't just change how you look — it changes how you feel. The constant checking in mirrors, the strategic parting, the anxiety before every photo. Dr. Groot isn't just a serum. It's the moment you stop managing your hair loss and start reversing it.

Thousands of women have already made the switch. They're wearing their hair down again. Trying new styles again. Feeling like themselves again. Your turn.

Try It Completely Risk-Free

If you don't see thicker, fuller hair — simply return it. No questions, no drama. We stand behind every bottle.


Your Best Hair Is 2 Weeks Away.

Clinically proven. Award-winning. Used by A-list stylists.

Dr. Groot Hair Thickening Roll-On Serum
Dr. Groot™ Hair Thickening Serum
★★★★★ Thousands of 5-star reviews
Get Thicker Hair Now →

Free shipping available · Hassle-free returns

🧬
Clinically
Tested
🩺
Dermatologist
Tested
🎨
Safe for
Colour-Treated Hair

*Results based on clinical studies conducted on subjects using the full Dr. Groot Scalp Revitalizing Solution regimen daily for 2 weeks. Individual results may vary. Dr. Groot products are not intended to diagnose, treat, cure, or prevent any disease. This page is for educational and informational purposes only and is not intended as medical advice.