BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
BIOSTIM™ SCALP SERUM
NEW
4.4
Rated 4.4 out of 5 stars
38 Reviews
OBAGI NU-CIL® ,

BIOSTIM™ SCALP SERUM

Hair Density Scalp Serum

$125.00
Excluded from all Discounts
BIOSTIM™ SCALP SERUM

BIOSTIM™ SCALP SERUM

Free 30-Day Returns

Best for
Skin Types: Normal to OilyNormal to DryCombination

Obagi Nu-Cil BioStim Scalp Serum promotes optimal scalp health and fortifies hair follicles for visibly denser, fuller hair. Powered by clinically proven actives, the BioStim™ Complex targets key factors that influence scalp health and hair resilience, delivering a comprehensive, root-level approach to hair revitalization.

  • Hydrates, soothes, repairs, and balances the scalp to create an optimal environment for hair growth
  • Strengthens, nourishes, protects hair follicles and boosts circulation as you massage the scalp for visibly fuller, denser hair

In less than 6 months, clinically proven* to:

  • Significantly improve hair volume by 52%**
  • Significantly reduce scalp redness by 29%**
  • Significantly reduce scalp oiliness by 22%**

*Results based on a 2025 24-week clinical test. Data on file at Obagi Cosmeceuticals LLC.
**When compared to the untreated control group.

Backed By Clinical Trials

97%
reduction in the amount of dry fallen hair after 24 weeks*
74%
increase in scalp hydration after 24 weeks*
90%
of participants agreed their hair looked healthier after 24 weeks*
90%
of participants agreed the serum reduced hair breakage after 24 weeks*
Baseline* After 12 Weeks*
*Results based on a 2025 24-week clinical test. Photos have not been retouched. Individual results may vary. Data on file at Obagi Cosmeceuticals LLC. **When compared to the untreated control group.
Baseline After 12 weeks*
*Results based on a 2025 24-week clinical test. Photos have not been retouched. Individual results may vary. Data on file at Obagi Cosmeceuticals LLC. **When compared to the untreated control group.
Baseline After 12 weeks*
*Results based on a 2025 24-week clinical test. Photos have not been retouched. Individual results may vary. Data on file at Obagi Cosmeceuticals LLC. **When compared to the untreated control group.
Baseline After 12 weeks*
*Results based on a 2025 24-week clinical test. Photos have not been retouched. Individual results may vary. Data on file at Obagi Cosmeceuticals LLC. **When compared to the untreated control group.

How To Use

  • Apply serum once daily. Part hair and dispense directly onto the scalp. Gently massage with fingertips to ensure even distribution and boost circulation. Can be applied to either dry or damp hair. Do not rinse.
  • Can be applied in the morning or at night. Allow serum to absorb fully and air-dry completely. This is a leave-in product, style your hair as usual. Apply daily for best results.



Storage

  • Keep out of direct sunlight.
  • Store at controlled room temperature 15°−25°C (59°−77°F).
4.4
Rated 4.4 out of 5 stars
Based on 38 reviews
Reviews Summary
Customers say this scalp serum is easy to apply and absorbs quickly without leaving residue or making hair greasy. Many users report noticing new hair growth and reduced hair shedding within the first month of daily use, with particularly positive results around temples and thinning areas. The clear applicator makes application straightforward, and the product dries fast without affecting hair appearance. While most find it effective for improving hair density, some users with fine hair report it feels too oily. A few customers experienced scalp irritation or saw no results after several weeks of use. The price point is considered expensive by some users.
Write a Review (Opens in a new window)
38 reviews
  • Devereux B.
    FL, United States
    Verified Buyer
    I recommend this product
    Age 45-54
    Gender Female
    Rated 5 out of 5 stars
    June 23, 2026
    Great product

    So far, this is a really nice product. It’s easy to use and does not smell. There’s no residue left on my hair. I have not used it long enough to know about the efficacy. I will continue to use it and report back later.

    EffectivenessRated 5.0 on a scale of 1 to 5
    Was this helpful?
  • Kimberly S.
    AL, United States
    Verified Buyer
    I recommend this product
    Age 25-34
    Gender Female
    Rated 5 out of 5 stars
    June 23, 2026
    Just incredible..

    Words cannot describe how excited I am for this new me obagi scalp serum provides for me…

    EffectivenessRated 5.0 on a scale of 1 to 5
    Was this helpful?
  • Kelsey N.
    FL, United States
    Verified Buyer
    I recommend this product
    Age 35-44
    Gender Female
    Rated 5 out of 5 stars
    May 18, 2026
    Visible Results

    Seeing hair growth and fullness after two months of use!!

    EffectivenessRated 5.0 on a scale of 1 to 5
    Was this helpful?
  • Geraldine H.
    CA, United States
    Verified Buyer
    I recommend this product
    Age Over 65
    Gender Female
    Rated 5 out of 5 stars
    May 16, 2026
    Scalp serum

    Live it & it helped with my scalp & hair growth. Amazing product..

    EffectivenessRated 5.0 on a scale of 1 to 5
    Was this helpful?
  • Hafiza
    I recommend this product
    Rated 5 out of 5 stars
    May 15, 2026
    5 Stars

    Loved it its very hydrating without leaving scalp greasy

    Was this helpful?
Show More