Cold Processed®

Thick + Full Hair System

Name: Thick + Full Hair System
Brand: Act+Acre
Price: 138.00 USD
Availability: InStock
Rating: 4.7 (985 reviews)

4.7

Rated 4.7 out of 5 stars

985 Reviews

This 3-step system features lightweight, science-backed formulas to target early signs of thinning. Removes build-up, balances oil, and strengthens follicles for visible improvements in hair strength, fullness, and resilience.

+ Day 30: Scalp feels hydrated + balanced
+ Day 60: Hair is stronger with less breakage
+ Day 90: Hair fullness is visibly improved

Valued at: $170

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Thick + Full Hair System

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Why You Need This

cleansing

strengthening

volumizing

Real User Results

Consumer Testing

90% saw new hair growth in 6 weeks*

100% agree product increased hair thickness*

100% agree hair felt stronger + healthier*

*Based on consumer perception results from a 6-week third-party clinical study of 30 women aged 18-59, daily use of the product was shown to support hair regrowth following acute telogen effluvium

Best For

Scalp Type

dry normal oily

Hair Texture

straight wavy curly coily

Concerns

hair loss / thinning dryness lack of volume

Ingredients

Swiss Apple Stem Cells

Protects the hair follicle against damage for thicker looking hair in 12 weeks*

Caffeine

Invigorates scalp + fortifies the hair follicle to increase the feel of hair density

Bamboo and Pea Sprout Blend

Boosts scalp elasticity to create an environment for optimized hair follicle function

Full Ingredients

Thick + Full Hair System Full Ingredients

Stem Cell Shampoo Full Ingredients: Water (Aqua), Cocamidopropyl Betaine, Sodium Methyl Cocoyl Taurate, Glycerin, Betaine, Lactic Acid, Panthenol, Sodium Benzoate, Caffeine, Niacinamide, Sodium Chloride, Coco-Glucoside, Glyceryl Oleate, Sodium Gluconate, Cocodimonium Hydroxypropyl Hydrolyzed Wheat Protein, Hydrolyzed Rice Protein, Hyaluronic Acid, Isomalt, Benzyl Alcohol, Potassium Sorbate, Malus Domestica Fruit Cell Culture Extract, Triethyl Citrate, Juniperus Virginiana Oil, Amyris Balsamifera Bark Oil, Pogostemon Cablin Leaf Extract, Gamma-Nonalactone, Ionone, Elettaria Cardamomum Seed Oil, Cistus Ladaniferus Resin Extract, Cananga Odorata Flower Oil, Caprylic/Capric Triglyceride, Vanillin, Viola Odorata Leaf Extract, Hexenyl Acetate, Aquilaria Agallocha Wood Oil, Dimethyl Heptenal

Stem Cell Conditioner Full Ingredients: Water (Aqua), Behentrimonium Chloride, Glycerin, Crambe Abyssinica Seed Oil, Propanediol, Limnanthes Alba (Meadowfoam) Seed Oil, Cetearyl Alcohol, Glyceryl Stearate, Almond/Borage/Linseed/Olive Acids/Glycerides, Sodium Benzoate, Panthenol, Caffeine, Niacinamide, Lauryl Glucoside, Olea Europaea (Olive) Fruit Oil, Guar Hydroxypropyltrimonium Chloride, Sodium Gluconate, Tocopherol, Hydroxyethylcellulose, Hydrolyzed Rice Protein, Dehydroacetic Acid, Lactic Acid, Hyaluronic Acid, Helianthus Annuus (Sunflower) Seed Oil, Isomalt, Benzyl Alcohol, Sodium Hydroxide, Potassium Sorbate, Malus Domestica Fruit Cell Culture Extract, Triethyl Citrate, Juniperus Virginiana Oil, Amyris Balsamifera Bark Oil, Pogostemon Cablin Leaf Extract, Gamma-Nonalactone, Ionone, Elettaria Cardamomum Seed Oil, Cistus Ladaniferus Resin Extract, Cananga Odorata Flower Oil, Caprylic/Capric Triglyceride, Vanillin, Viola Odorata Leaf Extract, Hexenyl Acetate, Aquilaria Agallocha Wood Oil, Dimethyl Heptenal

Stem Cell Scalp Serum Ingredients: Water (Aqua), Glycerin, Butylene Glycol, Aloe Barbadensis Leaf Juice (ALOE), Bambusa Vulgaris Leaf/Stem Extract (BAMBOO), Caprylyl Glycol, Carbomer, Citric Acid, Plant-Based Collagen, Ethylhexylglycerin, Glucosamine Hcl, Glycereth-26, Lecithin, Leuconostoc/Radish Root Ferment Filtrate (RADISH), Malus Domestica Fruit Cell Culture Extract (APPLE), Pentylene Glycol, Phenoxyethanol, Pisum Sativum (Pea) Extract (PEA), Propanediol, Quercus Petraea Fruit Extract (OAK), Sodium Hyaluronate, Sodium Hydroxide, Tetrasodium Glutamate Diacetate, Xanthan Gum

FAQ

Can I use these products every day?

Yes! For optimal results, use the Stem Cell Shampoo and Stem Cell Conditioner daily in the shower, and apply the Stem Cell Scalp Serum every day to support your scalp health.

Can the serum be applied to wet or dry hair?

The serum can be applied to both! For best results, apply it daily to clean, damp hair or directly onto a dry scalp in the evening as an overnight treatment. The serum is designed to absorb into the scalp and should not be rinsed out immediately.

Can I use this system if I have a sensitive scalp?

Yes, this 3-step system is formulated to be gentle and nourishing. The lightweight, science-backed ingredients work to balance and hydrate the scalp while strengthening hair, making it suitable for those with sensitive scalps.

How to use Act+Acre Thick + Full Hair System:

For Stem Cell Shampoo:
Apply to wet hair. Start cleansing at the nape of the neck and work upward for a deeper cleanse. Cleanse twice for optimal results.

For Stem Cell Conditioner:
After shampooing, apply from mid-lengths to ends. Rinse thoroughly. Leave in for 2-3 minutes for added nourishment.

For 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.

pre-wash, post-wash

daily

Frequently Bought With

Act+Acre Scalp Detox, Plant Based Capsules and Cold Processed Stem Cell Scalp Serum Product Line up

Thick + Full Pro System

Promotes thicker + fuller feeling hair with less overall shedding

Learn More

Stem Cell Scalp Serum™

Restorative, antioxidant-rich serum

Learn More

Thick + Full Hair System

cleansing

strengthening

volumizing

pre-wash, post-wash

daily

4.7

Rated 4.7 out of 5 stars

Based on 985 reviews

Total 5 star reviews: 761 Total 4 star reviews: 175 Total 3 star reviews: 38 Total 2 star reviews: 4 Total 1 star reviews: 7

95%would recommend these products

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L
Lavta
Reviewing
Stem Cell Scalp Serum™
I recommend this product
Rated 5 out of 5 stars
11 months ago
Fantastic products
I’m having tons of new hair growth after 2 months of using the serum and vitamin
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J
Jaime
Verified Buyer
Reviewing
Stem Cell Scalp Serum™
I recommend this product
Rated 5 out of 5 stars
1 year ago
After a Few Months the Results Are REAL
This was my first time trying a scalp serum and I purchased my first bottle in Nov 2023. It's now been about 4 months and I couldn't be happier with the results. All of the baby hairs near my hair line have completely grown out to the point it looks like I got curtain bangs cut, and I did no such thing! The results of using this serum every day are truly incredible, even my hair stylist commented how the baby hairs have grown out and I actually got her using the serum as well :)
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M
Miel
Verified Buyer
Reviewing
Stem Cell Scalp Serum™
I recommend this product
Rated 5 out of 5 stars
1 year ago
LIFE CHANGING
I’m on my 3rd bottle of this amazing serum. My hair has grown so fast in such little time. My middle part is a lot fuller and my hair looks so shiny. I always get asked what I’m doing and I let them know the serum I use! I recently got asked if I was wearing extensions lol. I will forever purchase this serum. No questions asked.
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TW
Tammy W.
Verified Buyer
Reviewing
Stem Cell Scalp Serum™
I recommend this product
Rated 5 out of 5 stars
1 year ago
Get this in your basket!
I am in love with this growth serum, I have tried many but this one is different. It leaves your hair feeling clean and fresh still after using it, Zero greasy or heavy feeling film at the roots like many of the growth serums I have tried and I LOVE the line up of clean ingredients! Highly recommend!
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Aszure D.
Verified Buyer
Reviewing
Stem Cell Scalp Serum™
I recommend this product
Rated 5 out of 5 stars
1 year ago
It really works!!
I was noticing some thinning around my temple area and some shedding in the shower. I started using the Stem Cell serum every wash day, I been using the products about 6 weeks. I can see hair fuz where I was previously thinning, and very minimal shedding.
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Thick + Full Hair System