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Thicker roots, simpler routine
Swipe to compare — precision roll-on boosts the appearance of density along the part and hairline without grease or residue.
Root Density Boost
Helps increase the look of fullness at the roots and crown.
Fuller Part & Hairline
Targets sparse areas for a denser, more uniform part and hairline.
Root Density Boost
Helps increase the look of fullness at the roots and crown.
Fuller Part & Hairline
Targets sparse areas for a denser, more uniform part and hairline.
Stronger-Feeling Strands
Supports more resilient hair to reduce the look of breakage.
Balanced, Non-Greasy Scalp
Fast-absorbing formula keeps the scalp comfortable with no residue.




Stronger-Feeling Strands
Supports more resilient hair to reduce the look of breakage.
Balanced, Non-Greasy Scalp
Fast-absorbing formula keeps the scalp comfortable with no residue.
Fuller-looking hair that lasts
95%
Said roots looked fuller along the part and hairline after 2 weeks
94%
Reported hair felt stronger with less visible breakage
90%
Noticed a healthier-looking scalp with no greasy residue
* Results based on customer feedback and consumer trials.
FAQs
Dr. Groot Scalp Solution Hair Thickening Roll On Serum™ delivers a concentrated, leave-in blend directly to the scalp—right where fullness begins. The precision roll-on targets sparse areas along the part and hairline, while the lightweight formula absorbs fast and won’t leave residue. A scalp-support complex (think strengthening peptides, energizing compounds, and barrier-supporting hydrators) works together to fortify strands at the root, balance the scalp, and help minimize buildup around follicles. A quick massage boosts distribution and absorption. With consistent daily use, it promotes the look of thicker roots and a fuller-looking part while keeping the scalp comfortable and hair feeling stronger over time.
Yes—it's designed to be gentle and non-irritating.
No—the formula is fast-absorbing and residue-free, so hair feels clean and styles as usual.
Some notice immediate lift; fuller-looking density typically appears with consistent use over 2–4 weeks. Results vary by hair type and routine.