Cold Processed®
Stem Cell Thickening Foam™
Rated 5.0 out of 5 stars
24 Reviews
Volume Now. Density Later.
This bi-phase foam pairs clinically proven 2% Apple Stem Cells with Hydrolyzed Rice Protein, lifting roots and supporting thicker-looking hair in one step. Recommended for early-stage thinning, when scalp support matters most.
Size: 4 fl oz
Save 30% on Your First Subscription
(All following orders save 20%)
(All following orders save 20%)
Why You Need This
Real User Results
Consumer Testing
95%
agree the foam gives volume and lift at the roots*
85%
agree their scalp felt healthier and more balanced*
90%
agree the foam feels lightweight and non-sticky*
*Based on an independent consumer trial conducted by Act+Acre with 20 participants over 12 weeks using Stem Cell Thickening Foam™
Scalp Science
Stem Cell Thickening Foam™ is a bi-phase formula. Most foams avoid oils because they require heavy stabilizers to keep the formula emulsified, which weigh your hair down. This innovative bi-phase formula keeps lightweight oils separated until you shake, creating a weightless foam that delivers scalp care and volume in one step.
Stem Cell Scalp Layer (water phase):
+ Clinically backed 2% Apple Stem Cells support the scalp's natural hair growth cycle.
+ Caffeine + Amino Acid Complex energize and hydrate the scalp.
+ Sarcosine + Prebiotic Inulin help regulate excess sebum and support the scalp microbiome.
Flexible Fiber Layer (oil phase):
+ Jojoba Oil mimics the scalp’s natural lipids for a non-greasy feel.
+ Hydrolyzed Rice Protein and Corn Starch instantly coat each strand for volume, without the silicones or heaviness.
Stem Cell Scalp Layer (water phase):
+ Clinically backed 2% Apple Stem Cells support the scalp's natural hair growth cycle.
+ Caffeine + Amino Acid Complex energize and hydrate the scalp.
+ Sarcosine + Prebiotic Inulin help regulate excess sebum and support the scalp microbiome.
Flexible Fiber Layer (oil phase):
+ Jojoba Oil mimics the scalp’s natural lipids for a non-greasy feel.
+ Hydrolyzed Rice Protein and Corn Starch instantly coat each strand for volume, without the silicones or heaviness.
Best For
Scalp Type
dry
normal
oily
Hair Texture
straight
wavy
curly
coily
Concerns
hair loss + thinning
lack of volume
fine hair
silicone free
paraben free
gluten free
sls free
water based
sulfate free
Ingredients
2% Apple Stem Cells
Supports the scalp’s natural hair growth cycle + helps protect follicles from oxidative stress associated with thinning hair.
Hydrolyzed Rice Protein
Helps strengthen hair fibers while providing visible volume + flexible styling hold.
Amino Acid Complex
Strengthens hair strands + enhances moisture and elasticity.
Full Ingredients
Stem Cell Thickening Foam™ Full Ingredients
Aqua/Water/Eau, Simmondsia Chinensis (Jojoba) Seed Oil, Isopentyldiol, Pentylene Glycol, Propanediol, Decyl Glucoside, Hydrolyzed Corn Starch, Polyglyceryl-4 Caprate, Polyglyceryl-6 Caprylate, Glycerin, Inulin, Sodium Benzoate, Brassica Campestris/Aleurites Fordi Oil Copolymer, Fragrance (Parfum), Hydroxypropylgluconamide, Aureobasidium Pullulans Ferment Extract, Caffeine, Citric Acid, Hydrolyzed Rice Protein, Malus Domestica Fruit Cell Culture Extract, Hydroxypropylammonium Gluconate, Caprylhydroxamic Acid, Hydroxypropyl Methylcellulose, Amaranthus Caudatus Seed Extract, Sodium PCA, Sarcosine, Sodium Lactate, Arginine, Aspartic Acid, PCA, Xanthan Gum, Benzyl Alcohol, Alanine, Glycine, Tartaric Acid, Serine, Potassium Sorbate, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Tocopherol, Sodium Hydroxide, Tetramethyl Acetyloctahydronaphthalenes, Limonene, Linalyl Acetate, Juniperus Virginiana Oil, Citrus Aurantium Bergamia (Bergamot) Peel Oil, Linalool, Evernia Prunastri (Oakmoss) Extract, Pinene, Terpineol, Beta-Caryophyllene, Citral.
FAQ
Is this a styling product or a scalp treatment?
It’s both. Stem Cell Thickening Foam™ delivers immediate styling benefits like root lift and volume, while 2% Apple Stem Cells help support the scalp’s natural hair growth cycle for thicker-looking hair over time. Think of it as styling powered by scalp care.
Can I use Stem Cell Thickening Foam™ with other Act+Acre scalp treatments?
Yes. Stem Cell Thickening Foam™ can be used alongside other Act+Acre scalp treatments like the Stem Cell Scalp Serum or Peptide Scalp Treatment. Apply your scalp treatment first and allow it to absorb, then apply the foam to damp hair before styling. The foam provides instant root lift and volume while continuing to support a healthy scalp environment over time.
Will this make my hair crunchy or stiff?
No. The formula is designed to provide lightweight, flexible hold without the stiffness or sticky feel often associated with traditional mousses. Hair remains soft, touchable, and naturally voluminous.
How much product should I use?
Start with 2–4 pumps for fine to medium hair, focusing on the roots and distributing through the hair. If your hair is longer or thicker, you can add more product gradually to build volume without weighing hair down.
How to Use:
Shake well to activate the bi-phase formula. Apply 2–4 pumps to damp scalp and roots. Distribute evenly throughout hair using hands or comb. Leave in. Air-dry for soft lift or blow-dry for added fullness and volume.
Shake well to activate the bi-phase formula. Apply 2–4 pumps to damp scalp and roots. Distribute evenly throughout hair using hands or comb. Leave in. Air-dry for soft lift or blow-dry for added fullness and volume.
post-wash
as needed
100%would recommend these products
24 reviews
- CChristineReviewingStem Cell Thickening Foam™I recommend this productRated 5 out of 5 stars7 minutes ago5 Stars
love this product.
- SCSharron C.Verified BuyerReviewingStem Cell Thickening Foam™I recommend this productWhat is your main hair goal? I want to hydrate + de-frizz my hairDo you experience hair loss? Moderate or gradual hair thinningDo you experience any scalp concerns? Itchiness, SensitivityRated 5 out of 5 stars4 hours agoA Long Lasting and Firm Body
I have a moderate amount of hair but it is fine so I need a product that can give me more thickness and body. Stem Cell Thickening Foam gives a feel to my hair that is fuller, yet flexible. And it has no noticeable buildup on my scalp. It gives me a result that will last to my next day, since I wash my hair every other day.
- PAPeggy A. P.Verified BuyerReviewingStem Cell Thickening Foam™I recommend this productWhat is your main hair goal? I want to grow longer ahirDo you experience hair loss? No hair thinningDo you experience any scalp concerns? ItchinessRated 4 out of 5 starsYesterdayHelps with volume
I am still on the fence as it does help with volume, especially the next day, as I don’t wash my hair every day. It does seem to leave a film on my hair which I don’t like. I don’t use a lot, shake it well prior to using. Maybe it is just my hair. Not sure if I will continue to use it.
- MAMaribel A.Verified BuyerReviewingStem Cell Thickening Foam™I recommend this productWhat is your main hair goal? I want to stop my hair thinningDo you experience hair loss? Moderate or gradual hair thinningDo you experience any scalp concerns? OilinessRated 5 out of 5 stars1 week agoStem Cell Thickening Foam
I love this product! It's hard to find a thickening product when you have thin hair. I love that it doesn't way your hair down and doesn't make you hair oily. I actually love all the products I'm using from Act & Acre. I just went to my hair appointment and was told I had a lot of new hair. Very exciting, since I've tried it all.
- SSummerReviewingStem Cell Thickening Foam™I recommend this productRated 5 out of 5 stars3 weeks ago5 Stars
Love all the volume. Love how my hair feels.