Stem Cell 2-Step Thickening System
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
(All following orders save 20%)
Why You Need This
Real User Results
Stem Cell Scalp Layer (water phase): Clinically backed 2% Apple Stem Cells Stem Cells live in the bulge. They migrate into the hair bulb each growth cycle to regenerate the follicle support scalp longevity and the natural hair growth cycle. Caffeine energises scalp appearance. Sarcosine helps regulate excess sebum. Prebiotic Inulin provides scalp microbiome support. Amino Acid Complex deliver scalp hydration.
Flexible Fiber Layer (oil phase): Jojoba Oil mimics the scalp’s natural lipids for a non-greasy feel. Brassica-derived Polymers create a lightweight coating on each hair shaft — delivering thicker feel, separation, movement, and humidity resistance without silicones. Rice Protein and Hydrolyzed Corn Starch create instant expansion of the hair fiber. Pullulan Ferment wraps strands in a flexible film for airy lift.
gluten free
paraben free
silicone free
2% Apple Stem Cells
Hydrolyzed Rice Protein
Bamboo and Pea Sprout Blend (2%)
Stem Cell 2-Step Thickening System Full Ingredients
Stem Cell Scalp Serum: Aqua/Water/Eau, Glycerin, Butylene Glycol, Aloe Barbadensis Leaf Juice, Pentylene Glycol, Propanediol, Xanthan Gum, Glucosamine HCl, Caprylyl Glycol, Glycereth-26, Pisum Sativum (Pea) Extract, Malus Domestica Fruit Cell Culture Extract, Carbomer, Bambusa Vulgaris Leaf/Stem Extract, Ethylhexylglycerin, Sodium Hyaluronate, Tetrasodium Glutamate Diacetate, Phenoxyethanol, Quercus Petraea Fruit Extract, Collagen, Lecithin, Leuconostoc/Radish Root Ferment Filtrate, Sodium Benzoate, Sodium Hydroxide, Potassium Sorbate, Sodium Glycolate, Sodium Formate, Citric Acid.
Can I use both products every day?
The Stem Cell Scalp Serum™ should be applied daily to clean, damp or dry hair for optimal results. The Stem Cell Thickening Foam™ is designed for use on wash days — apply to damp hair before styling.
Is this a styling system or a scalp treatment?
It's both. The Stem Cell Thickening Foam™ delivers instant root lift and flexible hold, while the Stem Cell Scalp Serum™ works daily to protect follicles and support thicker-looking hair over time. Think of it as styling powered by scalp care.
In what order should I apply the products?
Apply the Stem Cell Scalp Serum™ first to clean, damp or dry hair — massage into the scalp and leave on, no rinse needed. Then apply the Stem Cell Thickening Foam™ to damp roots and distribute evenly before styling.
Will the foam make my hair feel stiff or crunchy?
No. The formula provides lightweight, flexible hold without stiffness or sticky residue. Hair stays soft, touchable, and naturally voluminous.
Is this suitable for fine or thinning hair?
Yes. This system is specifically designed for fine to medium hair experiencing early signs of thinning. The lightweight formulas add instant volume and body without weighing hair down, while supporting scalp health over time.
Can I use this system if I have a sensitive scalp?
Yes. Both formulas are lightweight and designed to support scalp balance. The Stem Cell Scalp Serum™ is vegan, fragrance-free, and suitable for all scalp types including dry, normal, and oily.
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
- 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.
- CBChristian B.Verified BuyerReviewingStem Cell Scalp Serum™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? No scalp concernsRated 5 out of 5 stars1 week agoThicker, fuller hair achieved
I'd previously tried Stem Cell Scalp Serum, but was not consistent in my use of it. This time I have been very consistent at applying it almost every day for approximately 9 weeks, and the difference is noticeable. My wife has even commented that an area that was thinning at the crown of my head and the mid-frontal point / Widow’s Peak is noticeably fuller. I can also feel that my normally fine hair feels thicker with more body. I use the entire Act + Acre system including the shampoo and conditioner.