Stem Cell 2-Step Thickening System – Act+Acre

We Ship to US & Canada Free Shipping $75+

Close Icon
Close Icon

Your cart is empty.

Cold Processed®

Stem Cell 2-Step Thickening System

4.7
Rated 4.7 out of 5 stars
761 Reviews

Clinically proven two-step scalp system. The 2-Step Thickening System for fuller-looking hair, from root to end.

The Stem Cell Scalp Serum™ fortifies the follicle environment to lessen the first signs of visible shedding. The Stem Cell Thickening Foam™ styles and lifts, waking up inactive-looking follicles and delivering instant lift from the first application.

The Results:
+ 56% less visible hair fall-out in 12 weeks with Stem Cell Scalp Serum. 85.7% saw more scalp coverage.**
+ 94% noticed more volume + lift at the root from first application.*
+ Trichologist-formulated, Cold Processed® below 40°C
+ Vegan, no rinse, leave-on — both products

Valued at: $138

Stem Cell Thickening Foam™ | Full Size | 4 oz
Stem Cell Scalp Serum™ | Full Size | 2.2 oz

One time purchase not eligible for discounts.

Save 30% on Your First Subscription
(All following orders save 20%)
Why You Need This
thickening
strengthening
volumizing
Real User Results
Before/After of hair growth when using Stem Cell Scalp Serum
Before/After of hair growth when using Stem Cell Scalp Serum
Before/After of hair growth when using Stem Cell Scalp Serum

Save with sets

A bottle of Act+A. Stem Cell Thickening Foam with a white pump dispenser and a frosted clear bottle showing a pale yellow-green liquid, set against a clean gray gradient background.
Stem Cell Thickening Foam™
Volume Now. Density Later.
Learn More
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
How to use Act+Acre Stem Cell 2-Step Thickening System:

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.

Stem Cell Thickening Foam™:
Shake well to activate bi-phase formula. Apply 2–4 pumps to damp scalp and roots. Distribute evenly throughout hair. Leave in. Air-dry for soft lift or blow-dry for added fullness.
post-wash
as needed

Save with sets

A bottle of Act+A. Stem Cell Thickening Foam with a white pump dispenser and a frosted clear bottle showing a pale yellow-green liquid, set against a clean gray gradient background.
Stem Cell Thickening Foam™
Volume Now. Density Later.
Learn More
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
4.7
Rated 4.7 out of 5 stars
Based on 761 reviews
94%would recommend these products
Slide 1 selected
761 reviews
  • PD
    Paige D.
    Verified Buyer
    Reviewing
    Stem Cell Scalp Serum™
    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
    5 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!

  • TW
    Toni W.
    Verified Buyer
    Reviewing
    Stem Cell Thickening Foam™
    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
    6 days ago
    Love it

    As soon I saw that this was coming I checked every day for the drop I bought it, I love it and it has become my favorite for daily styling ❤️❤️❤️❤️❤️❤️❤️

  • AA
    Amira A.
    Verified Reviewer
    Reviewing
    Stem Cell Thickening Foam™
    I recommend this product
    What is your main hair goal? I want to stop my hair thinning, I want to balance my oily scalp, I want to grow longer ahir
    Do you experience hair loss? No hair thinning
    Do you experience any scalp concerns? Oiliness
    Rated 5 out of 5 stars
    1 week ago
    Impressive results

    This lightweight foam has become a staple in my hair care routine especially after washing my hair and pairing it with the stem cell serum! It absorbs nicely and doesn't leave any residue or makes your scalp feel greasy it's really helped with volumizing and thickening the hair on my scalp I have noticed a difference after consistent use for weeks and how my scalp feels a lot fuller!

  • A
    Amelia
    Verified Reviewer
    Reviewing
    Stem Cell Thickening Foam™
    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? Itchiness, Dryness or flakiness, Sensitivity
    Rated 5 out of 5 stars
    1 week ago
    Easy to use, great results

    Really easy to incorporate into my daily hair routine, and it adds some nice volume to my hair! After regular use, I noticed that my hair seemed fuller, especially around my part. I have an irritable scalp but no adverse reactions to the mousse.

  • KM
    Katelyn M.
    Verified Reviewer
    Reviewing
    Stem Cell Thickening Foam™
    I recommend this product
    What is your main hair goal? I want to stop my hair thinning, I want to eliminate flakes, I want to hydrate + de-frizz my hair, I want to grow longer ahir
    Do you experience hair loss? Moderate or gradual hair thinning
    Do you experience any scalp concerns? Dryness or flakiness, Oiliness, Itchiness
    Rated 5 out of 5 stars
    1 week ago
    Root volume that lasts

    This product gave me lasting volume at the root. It survived my sweaty morning workout, giving me volume all day and even a scent boost! The hold is flexible, so you can change your hairstyle throughout the day and not lose the volume. Happy to finally have a styling product that does not leave think buildup on my scalp!