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🌿 Unlock your scalp’s full potential—because your hair deserves VIP treatment.
Dr. Groot Hair Thickening Serum is a clinically tested, Korean-inspired scalp treatment designed to reduce hair loss from breakage by over 80%, balance scalp oil, and boost hydration. Featuring a precision roll-on metal tip and a refreshing menthol-infused gel, it nourishes thinning hair with a potent blend of biotin, rosemary, caffeine, and niacinamide—free from parabens, silicones, sulfates, and gluten. Ideal for adults seeking a scientifically proven, non-greasy solution for fuller, thicker hair.









| Asin | B0DK22L979 |
| Best Sellers Rank | #7 in Scalp Treatments |
| Date First Available | 24 June 2025 |
| Manufacturer | Dr. Groot |
| Package Dimensions | 16.69 x 5 x 2.59 cm; 60 g |
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
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
Small amount but works great
Great product but the price is rough for the amount inside. I am purchasing again just wish it was cheaper or came with more.
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
Not much product
Not sure if it works I use it 3x and the product was gone I had read the reviews but I was very shocked how empty the bottle was so not really sure if this works. I want to keep trying but for the price and only 3x usage not sure if I want to risk it
Trustpilot
4 days ago
1 month ago