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✨ Unlock thicker, fuller hair with every roll-on refresh! 💆♂️
Dr. Groot’s Award-Winning Hair Thickening Serum is a clinically tested, Korean-inspired scalp treatment that reduces hair breakage by 82.2%, controls oil by 46.42%, and improves scalp hydration by 30%. Featuring a precision roll-on applicator and a menthol-infused gel, it exfoliates, cleanses, and nourishes with powerful natural ingredients like biotin and caffeine—free from parabens, silicones, sulfates, and gluten—for visibly thicker, healthier hair in just two weeks.

| Asin | B0DK22L979 |
| Best Sellers Rank | #36 in Hair Regrowth Treatments |
| Manufacturer | Dr. Groot |
| Package Dimensions | 6.5 x 1.97 x 1.06 inches; 1.76 ounces |
| Upc | 803954310108 |
User
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!
User
Before and after
Amazing it made my hair so thick and full on the first week I highly recommend the product line I love Dr. Groot ❤️❤️❤️
User
Disappointed.
I was really excited for this product but when using it the solution would barely come out and eventually stopped coming out completely. Huge waste of money since I barely got any use out of it. Seems like there is an issue with the packaging used to disburse the solution.
User
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.
User
Not enough product
Ran out by the 5th use.. for the price unfortunately it’s just not worth it. I mainly used it for the sides of my scalp and the back but in order for the product to be saturated properly on your scalp you do have to use your hands. I like the concept but of the pen and how it’s supposed to stimulate hair growth on the scalp using the roller but you’re better off finding a product & scalp tool that can go a lot further for your money/time.
User
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)
User
Hair serum?
This product to me is not like a serum, which is a thicker liquid. This is like water coming out and it ran down my forehead right into my eyes and all over my glasses so beware before using this that it’s like putting water right on you. I wish I had been forewarned about that because any serum that I’ve used is thicker.
User
Great results
Great product. Seen good results which has increased my confidence. The roll on applicator is nice and serums smell is nice
User
Disappointed – significant differences from my previous purchases
I have bought and used this serum multiple times previously and found this specific order to be inconsistent with what I normally receive. The liquid is completely thin and watery rather than the viscous gel texture I am accustomed to, causing it to leak through the rollerball applicator. The packaging print and barcode proportions also differ noticeably in sharpness and alignment from the authentic tubes I have at home. I have contacted customer support for a return and refund.
Trustpilot
2 months ago
3 days ago