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🌿 Unlock fuller, thicker hair with science and style—don’t let your scalp miss out!
Dr. Groot Hair Thickening Serum is a clinically tested, award-winning Korean scalp treatment that reduces hair loss by 82.2%, controls oil by 46.42%, and boosts scalp hydration by 30%. Featuring a precision roll-on applicator and a potent blend of biotin, caffeine, and botanical extracts, it exfoliates, cleanses, and nourishes for healthier, thicker hair without harmful additives.














| ASIN | B0DK22L979 |
| Active Ingredients | salicylic_acid |
| Best Sellers Rank | #3,640 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #31 in Hair Regrowth Treatments |
| Brand | Dr. Groot |
| Brand Name | Dr. Groot |
| Customer Reviews | 2.9 out of 5 stars 237 Reviews |
| Hair Type | All |
| Item Form | Gel |
| Item Volume | 0.5 Fluid Ounces |
| Item Weight | 0.06 Kilograms |
| Manufacturer | Dr. Groot |
| Number of Items | 1 |
| Recommended Uses For Product | Hair Thickening, Reduces Oil, Strengthening |
| UPC | 803954310108 |
N**A
A family favorite, especially for fine hair
I have fine hair, and had significant thinning around my temples due to styling and genetics. I've have tried a number of different products and this works the best. In 1 month, I've grown at least 1-2 inches of baby hairs. Although some of the new hair is gray, a win's a win! I have other family members that use the same solution and have seen similar changes. I also use this with Dr. Groot's Hair Thickening Shampoo, and Miracle In-shower treatment. When I was using only the Hair Thickening Shampoo, I didn't see much of a difference. However, when I added this serum plus the Miracle In-Shower treatment I saw an improvement with hair growth. Just fyi, it may take longer than 2 weeks to see a change. I'm not sure how folks are out of solution after a few uses. I wear this solution once a day and its lasted me a month already - and I still have plenty left. Perhaps to get the most of the product, when it's not in use, make sure that the pen stands upright and that you ensure the button to pump the is turned off to avoid spilling.
P**J
Not worth it
Used less than a week and already out. Only used in the front so not big area to cover. Not only have i seen no results (using the full system) but the product was either not new or definitely not worth the money.
A**R
Scalp health game changer
Absolutely love this product and have noticed a difference since using consistently from January 2026. I do wish it had a window to see how much product remains.
T**N
Great quality but Not enough product. Super sad that it ran out after my 3rd or 4th use.
It didn’t even last me a week. I didnt over use it just a few pumps. From the three or four times that I used it seemed great and easy application but again it was out after my 3rd or 4th time using it, it was empty. I switched to lilyeve. I would’ve loved to continue using the product but because it ran out so quickly and the price for it.. I can’t. Maybe if the company reached out to rectify I would switch back. Not sure if that’s normal. Thought it would maybe last me like three weeks to a month. Super upset because I really enjoyed it at first.
J**A
Didn’t see any results.
2 stars. I gave it a try, but I’m not convinced it works. It’s supposed to use for 2 weeks to notice any results, yet my bottle was empty in 7 days, so I never got to see real results. For the price, that’s disappointing. Maybe I’ll try it again later, but I’m going back to coffee and rosemary water for now, that I know it work.
G**N
Better for specific spots not overall scalp use
Works to an extent. Would recommend for specific spots not overall scalp use. It runs out pretty fast but it grew the spots I put it in! It’s a little pricey to have to purchase often.
J**A
Worth the price
A little pricey, but worth it
T**M
Useless
Very expensive for this little amount. It will not last more than 15 days even if you apply once a day. Neither it effects. No improvement. It does not work, don't buy it.
Trustpilot
2 weeks ago
2 weeks ago