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🌿 Unlock thicker, healthier hair—because your scalp deserves VIP treatment.
Dr. Groot Hair Thickening Serum is a clinically tested, Korean-inspired scalp treatment that reduces hair loss due to breakage by 82.2% in two weeks. Featuring a precision roll-on metal tip and a menthol-infused watery gel, it delivers targeted nourishment with a refreshing, lightweight feel. Formulated with biotin, rosemary leaf extract, salicylic acid, panthenol, niacinamide, and caffeine, this serum balances scalp oil by 46.4% while improving hydration by 30%, promoting fuller, thicker, and healthier-looking hair without parabens, silicones, sulfates, or gluten.
| ASIN | B0DK22L979 |
| Active Ingredients | salicylic_acid |
| Age Range Description | Adult |
| Age range (description) | Adult |
| Best Sellers Rank | #1,613 in Beauty ( See Top 100 in Beauty ) #2 in Scalp Treatments |
| Brand | Dr. Groot |
| Brand Name | Dr. Groot |
| Customer Reviews | 3.0 out of 5 stars 269 Reviews |
| Hair Type | Thinning |
| Item Form | Serum |
| Item Volume | 0.5 Fluid Ounces |
| Item Weight | 0.06 Kilograms |
| Item form | Serum |
| Item weight | 0.06 Kilograms |
| Manufacturer | Dr. Groot |
| Number of Items | 1 |
| Recommended Uses For Product | Hair Thickening, Reduces Oil, Strengthening |
| Scent | rosemary |
| Scent Name | rosemary |
| UPC | 803954310108 |
B**E
Barely anything in it!
Don’t be fooled by size!!! I never review things, but here I am. Listen to the other ppl saying it doesn’t last! Bc it doesn’t! I used this for 3 days! 3!!! It two small sections of my head-the front temple areas-morning and night. Went to use it this morning-completely gone. It did not leak. I have tried everything to get a drop out-nothing. It gave me one tiny pump and then nothing but dry. I really liked it bc it didn’t turn that section of my hair oily like others, and it didn’t leave a residue. But the amount of money it costs, for it to not even last a week, is extremely frustrating! I can’t imagine ppl using this long term!
E**G
5/5 stars
I have a widows peak that was thinning, and it was an insecurity of mine when I put my hair up. Started applying for 1-2 months, and already see results!! It is working a bit too well and making my peach fuzzies on my forehead a bit thicker…. But I’ll take that over thinning hair
K**A
Not so easy applicator.
So far I haved used it and i love the way it feels and I love the smell, unfortunately a week into using it the serum stopped coming out and I thought that I had run out. Fortunately after prying it open I found that I haven't even used a quarter of it, the applicator got clogged and wouldn't let anything out no matter how many times I have tried. For the week I used it I loved how my hair felt. I just wish the applicator was better (I switched it over to a bottle and there was still a good amount left in)
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.
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.
Trustpilot
2 months ago
2 weeks ago