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Cold Processed®

Prevent + Treat Peptide System

4.7
Rated 4.7 out of 5 stars
892 Reviews
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Clinically proven two-step scalp system. One daily routine for thicker, fuller-looking hair.

Mornings, your scalp needs protection. Evenings, it needs to repair. The Stem Cell Scalp Serum fortifies the follicle environment to lessen the first signs of visible shedding. The 3% Stem Cell Peptide Treatment targets the look of active thinning overnight, when your scalp's renewal cycle peaks.

+ 56% less visible hair fall-out in 12 weeks + 46% improvement in the appearance of fuller, denser hair
+ Targets thinning in two phases — prevention + active treatment
+ Supports scalp hydration + follicle environment
+ Trichologist-formulated, Cold Processed® below 40°C
+ Vegan, no rinse, leave-on — both products


Stem Cell Scalp Serum | Full Size | 2.2 oz
3% Stem Cell Peptide Treatment | Full Size | 3 oz

Save 30% on Your First Subscription
(All following orders save 20%)
Why You Need This
thickening
strengthening
preventative

Save with sets

Three bottles of Act+Acre plant-based stem cell hair care products on a gray background with a 'save $32' label.
Thick + Full Hair System
Promotes thicker + fuller feeling hair
Learn More
Three Stem Cell Serums on a gray background
Stem Cell Scalp Serum - 3 Pack
Restorative, antioxidant-rich serum
Learn More
How to Use:

Stem Cell Scalp Serum:
On clean damp or dry hair, apply 1—2 pipettes along the hairline and part. Massage into the scalp. Do not rinse.

3% Stem Cell Peptide Treatment:
On clean, damp scalp, spray 1—2 pumps per section. Massage into the scalp. Do not rinse. Use daily for best results.

Both products can be used post-wash on wet, damp, or dry hair at any time of day — we recommend the Stem Cell Scalp Serum in the morning and the 3% Stem Cell Peptide Treatment in the evening, or layer them together (Peptide Treatment first, then Serum) at the same time of day for maximum benefit.
post-wash
as needed

Save with sets

Three bottles of Act+Acre plant-based stem cell hair care products on a gray background with a 'save $32' label.
Thick + Full Hair System
Promotes thicker + fuller feeling hair
Learn More
Three Stem Cell Serums on a gray background
Stem Cell Scalp Serum - 3 Pack
Restorative, antioxidant-rich serum
Learn More
4.7
Rated 4.7 out of 5 stars
Based on 892 reviews
94%would recommend these products
Slide 1 selected
892 reviews
  • PD
    Paige D.
    Verified Buyer
    I recommend this product
    What is your main hair goal? I want to grow longer ahir, I want to stop my hair thinning
    Do you experience hair loss? Moderate or gradual hair thinning
    Do you experience any scalp concerns? Sensitivity
    Rated 5 out of 5 stars
    3 days ago
    Love it

    I have been using this serum for just over a month and absolutely love it. I started using it when I began having more shedding than usual. It is definitely helping with the shedding, it does not irritate my sensitive scalp as other scalp serums do, and it does not weigh down my fine hair at all. This will be a new staple in my daily hair routine and I will continue to purchase!

  • MB
    Melissa B.
    Verified Buyer
    I recommend this product
    What is your main hair goal? I want to stop my hair thinning
    Do you experience hair loss? Severe or rapid hair thinning
    Do you experience any scalp concerns? Itchiness, Sensitivity
    Rated 5 out of 5 stars
    3 weeks ago
    It's helping!

    I have experienced a ton of hair shedding throughout the year due to being postpartum, plus thyroid imbalances. I think with consistent use, this spray really does encourage hair growth. I experienced the first round of postpartum (+hyperthyroidism) hair loss at it's peak in January, I started using the peptide treatment in February and the new growth is almost 3 inches in early September. Another round of significant shedding started mid-summer once I swung to hypothyroidism and and now in early September I can already see baby hairs around my hairline. I've really been through it with my hair this year and am still experiencing shedding as we work toward balancing my thyroid levels, but at least I know new hair is coming in. I currently wash my hair and use this product every other day.

  • NG
    Nathalie G.
    Verified Buyer
    I recommend this product
    What is your main hair goal? I want to grow longer ahir
    Do you experience hair loss? Moderate or gradual hair thinning
    Do you experience any scalp concerns? No scalp concerns
    Rated 5 out of 5 stars
    3 weeks ago
    Best hair growth product

    See results within matter of days . Favorite product.

  • IS
    Ina S.
    Verified Buyer
    I recommend this product
    What is your main hair goal? I want to stop my hair thinning
    Do you experience hair loss? Moderate or gradual hair thinning
    Do you experience any scalp concerns? No scalp concerns
    Rated 5 out of 5 stars
    1 month ago
    Regrowth

    Stem cell serum gave me back my hair I am happy to report.

  • C
    Corrine
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Only been a week but can honestly say relief crept im from day one - scallp had been feeling tight and itchy without flakes for about a year . This is the third product of its type ive tried and no satisfaction from the other 2 brands . Also , no overlap in usage . Has been over 3 months since touched the others . So, I am positive the progress is from this . Yes , its pricey compared to a majority of the others but I believe its a case of “ you get what you pay for”