Ouai Hydrating Scalp Serum for Healthy, Fuller Looking Hair Versus Act+Acre 2% Stem Cell H2-Grow Complex™ Scalp Serum for Hair Growth
Overview
What they are
These products are both vegan, cruelty-free, and reef safe hair serums. They have a total of 9 ingredients in common
Cool Features
They both contain hyaluronic acid
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin and scar healing
Free From
They both do not contain any harsh alcohols, oils, parabens, silicones or sulfates
We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that needs an update? Let us know.
Ingredient Info
Ouai Hydrating Scalp Serum for Healthy, Fuller Looking Hair 28 ingredients
Act+Acre 2% Stem Cell H2-Grow Complex™ Scalp Serum for Hair Growth 28 ingredients
What's inside (and what isn't)
What's inside (and what isn't)
At a glance
Click on any of the items below to learn more
Ouai Hydrating Scalp Serum for Healthy, Fuller Looking Hair 28 ingredients
Act+Acre 2% Stem Cell H2-Grow Complex™ Scalp Serum for Hair Growth 28 ingredients
Key Ingredients
Benefits
Concerns
Benefits
Ingredients Side-by-side
Water
Skin ConditioningPolysorbate 20
Emulsifying
Butylene Glycol
Humectant
Glycerin
Humectant
Polyquaternium-7
Rhodiola Rosea Extract
EmollientSodium Hyaluronate
Humectant
Tocopheryl Acetate
Antioxidant
Acetyl Tetrapeptide-3
Skin Protecting
Tocopherol
Antioxidant
Rosa Centifolia Flower Extract
AstringentDextran
Trifolium Pratense Flower Extract
Astringent
Acanthopanax Senticosus Root Extract
Skin ConditioningRhaponticum Carthamoides Root Extract
Skin ConditioningInonotus Obliquus Extract
Skin ConditioningSelaginella Lepidophylla Extract
EmollientEthylhexylglycerin
Skin ConditioningDisodium EDTA
Sodium Hydroxide
BufferingAcrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingCitric Acid
Buffering
Sodium Benzoate
Masking
Phenoxyethanol
Preservative
Parfum
Masking
Eugenol
Perfuming
Limonene
Perfuming
Linalool
Perfuming
Water, Polysorbate 20, Butylene Glycol, Glycerin, Polyquaternium-7, Rhodiola Rosea Extract, Sodium Hyaluronate, Tocopheryl Acetate, Acetyl Tetrapeptide-3, Tocopherol, Rosa Centifolia Flower Extract, Dextran, Trifolium Pratense Flower Extract, Acanthopanax Senticosus Root Extract, Rhaponticum Carthamoides Root Extract, Inonotus Obliquus Extract, Selaginella Lepidophylla Extract, Ethylhexylglycerin, Disodium EDTA, Sodium Hydroxide, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Citric Acid, Sodium Benzoate, Phenoxyethanol, Parfum, Eugenol, Limonene, Linalool
Water
Skin ConditioningGlycerin
Humectant
Butylene Glycol
Humectant
Aloe Barbadensis Leaf Juice
Skin Conditioning
Pentylene Glycol
Skin ConditioningPropanediol
Solvent
Xanthan Gum
EmulsifyingGlucosamine Hcl
Caprylyl Glycol
EmollientGlycereth-26
Humectant
Pisum Sativum Extract
Skin ConditioningMalus Domestica Fruit Cell Culture Extract
Skin ConditioningCarbomer
Emulsion StabilisingBambusa Vulgaris Leaf/Stem Extract
HumectantEthylhexylglycerin
Skin ConditioningSodium Hyaluronate
Humectant
Tetrasodium Glutamate Diacetate
Phenoxyethanol
Preservative
Quercus Petraea Fruit Extract
Skin ConditioningCollagen
Moisturising
Lecithin
Emollient
Leuconostoc/Radish Root Ferment Filtrate
Antimicrobial
Sodium Benzoate
Masking
Sodium Hydroxide
BufferingPotassium Sorbate
Preservative
Sodium Glycolate
BufferingSodium Formate
Buffering
Citric Acid
Buffering
Water, Glycerin, Butylene Glycol, Aloe Barbadensis Leaf Juice, Pentylene Glycol, Propanediol, Xanthan Gum, Glucosamine Hcl, Caprylyl Glycol, Glycereth-26, Pisum Sativum 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
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Butylene Glycol (or BG) is used within cosmetic products for a few different reasons:
Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients.
Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness.
Learn more about Butylene GlycolCitric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).
As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and even out skin tone.
If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.
Read more about some other popular AHA's here:
Learn more about Citric AcidEthylhexylglycerin (we can't pronounce this either) is commonly used as a preservative and skin softener. It is derived from glyceryl.
You might see Ethylhexylglycerin often paired with other preservatives such as phenoxyethanol. Ethylhexylglycerin has been found to increase the effectiveness of these other preservatives.
Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.
A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.
As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.
Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.
Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.
In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.
This ingredient is organic, colorless, odorless, and non-toxic.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
Learn more about GlycerinPhenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent microbial growth. By itself, it has a scent that is similar to that of a rose.
It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.
Sodium Benzoate is a preservative. It's used in both cosmetic and food products to inhibit the growth of mold and bacteria. It is typically produced synthetically.
Both the US FDA and EU Health Committee have approved the use of sodium benzoate. In the US, levels of 0.1% (of the total product) are allowed.
Sodium benzoate works as a preservative by inhibiting the growth of bacteria inside of cells. It prevents the cell from fermenting a type of sugar using an enzyme called phosphofructokinase.
It is the salt of benzoic acid. Foods containing sodium benzoate include soda, salad dressings, condiments, fruit juices, wines, and snack foods.
Studies for using ascorbic acid and sodium benzoate in cosmetics are lacking, especially in skincare routines with multiple steps.
We always recommend speaking with a professional, such as a dermatologist, if you have any concerns.
Learn more about Sodium BenzoateSodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.
Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.
Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.
These are some other common types of Hyaluronic Acid:
Learn more about Sodium HyaluronateSodium Hydroxide is also known as lye or caustic soda. It is used to adjust the pH of products; many ingredients require a specific pH to be effective.
In small amounts, sodium hydroxide is considered safe to use. However, large amounts may cause chemical burns due to its high alkaline.
Your skin has a natural pH and acid mantle. This acid mantle helps prevent harmful bacteria from breaking through. The acid mantle also helps keep your skin hydrated.
"Alkaline" refers to a high pH level. A low pH level would be considered acidic.
Learn more about Sodium HydroxideWater. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.
So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.
You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Stay hydrated!
Learn more about WaterIngredient Ratings
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