Under Your Skin Hair Growth Activating Serum Versus The Ordinary Multi-Peptide Serum for Hair Density
Updated on August 30, 2024
Overview
What they are
These products are both vegan, cruelty-free, and reef safe hair loss. They have a total of 6 ingredients in common
Cool Features
They both contain AHA
Suited For
They're both likely to be good for anti aging, dry skin, brightening skin, sensitive skin, oily skin, reducing pores, scar healing, dark spots and better texture
Free From
They both do not contain any harsh alcohols, common allergens, 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
Under Your Skin Hair Growth Activating Serum 14 ingredients
The Ordinary Multi-Peptide Serum for Hair Density 36 ingredients
About this product
About this product
At a glance
Click on any of the items below to learn more
Under Your Skin Hair Growth Activating Serum 14 ingredients
The Ordinary Multi-Peptide Serum for Hair Density 36 ingredients
Key Ingredients
Benefits
Concerns
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Skin ConditioningPropanediol
SolventButylene Glycol
Humectant
Glycerin
Humectant
Caffeine
Skin ConditioningBiotinoyl Tripeptide-1
Acetyl Tetrapeptide-3
Skin Protecting
Larix Europaea Wood Extract
HumectantPisum Sativum Extract
Skin ConditioningScutellaria Baicalensis Root Extract
AstringentTriticum Vulgare Germ Extract
Skin ConditioningGlycine Soja Germ Extract
EmollientTrifolium Pratense Flower Extract
Astringent
Camellia Sinensis Leaf Extract
Antimicrobial
Apigenin
Antioxidant
Oleanolic Acid
Skin ConditioningArginine
Masking
Glycine
Buffering
Calcium Gluconate
HumectantZinc Chloride
SoothingLactic Acid
Buffering
Gluconolactone
Skin Conditioning
Dextran
Maltodextrin
AbsorbentHydroxyethylcellulose
Emulsion StabilisingXanthan Gum
EmulsifyingPentylene Glycol
Skin ConditioningDimethyl Isosorbide
SolventPolysorbate 20
Emulsifying
PPG-26-Buteth-26
Skin ConditioningPEG-40 Hydrogenated Castor Oil
Emulsifying
Trisodium Ethylenediamine Disuccinate
Sodium Metabisulfite
Antioxidant
Sodium Benzoate
Masking
Phenoxyethanol
Preservative
Chlorphenesin
Antimicrobial
Water, Propanediol, Butylene Glycol, Glycerin, Caffeine, Biotinoyl Tripeptide-1, Acetyl Tetrapeptide-3, Larix Europaea Wood Extract, Pisum Sativum Extract, Scutellaria Baicalensis Root Extract, Triticum Vulgare Germ Extract, Glycine Soja Germ Extract, Trifolium Pratense Flower Extract, Camellia Sinensis Leaf Extract, Apigenin, Oleanolic Acid, Arginine, Glycine, Calcium Gluconate, Zinc Chloride, Lactic Acid, Gluconolactone, Dextran, Maltodextrin, Hydroxyethylcellulose, Xanthan Gum, Pentylene Glycol, Dimethyl Isosorbide, Polysorbate 20, PPG-26-Buteth-26, PEG-40 Hydrogenated Castor Oil, Trisodium Ethylenediamine Disuccinate, Sodium Metabisulfite, Sodium Benzoate, Phenoxyethanol, Chlorphenesin
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
Water. 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 WaterGlycerin 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 GlycerinLactic Acid is an AHA that is derived from fermenting lactose, a carbohydrate from milk. It removes the top layer of old and dead skin cells and helps increase cell turnover.
Benefits of Lactic Acid are that it can help to reduce large pores and reduce the effects of aging. Some potential downsides are that it can be bad for dry skin, cause irritation, worsen eczema, and worsen rosacea.
Not only does it help exfoliate the skin, it helps strengthen the skin's barrier. When applied, lactic acid helps the skin create ceramides.
Lactic acid is an over-the-counter chemical exfoliant that comes from the fermentation of lactose — a carbohydrate found in milk.
Legend has it that Cleopatra used to bathe in sour milk to help reduce wrinkles.
Read more about some other popular AHA's here:
Learn more about Lactic AcidPentylene glycol is typically used within a product to thicken it. It also adds a smooth, soft, and moisturizing feel to the product. It is naturally found in plants such as sugar beets.
The hydrophilic trait of Pentylene Glycol makes it a humectant. As a humectant, Pentylene Glycol helps draw moisture from the air to your skin. This can help keep your skin hydrated.
This property also makes Pentylene Glycol a great texture enhancer. It can also help thicken or stabilize a product.
Pentylene Glycol also acts as a mild preservative and helps to keep a product microbe-free.
Some people may experience mild eye and skin irritation from Pentylene Glycol. We always recommend speaking with a professional about using this ingredient in your routine.
Pentylene Glycol has a low molecular weight and is part of the 1,2-glycol family.
Learn more about Pentylene GlycolMaltodextrin is a polysaccharide. It is derived from starch such as rice, corn, wheat, or potato starch.
In food, Maltodextrin is used to improve the texture and thicken a product. Due to its structure, it can help create a gel texture. As an emulsion stabilizer, it helps keep the ingredients in a product together.
As a polysaccharide, Maltodextrin has moisturizing properties. Polysaccharides are a type of carbohydrate. The top layer of skin uses polysaccharides to retain water, keeping the skin hydrated.
Maltodextrin is water soluble and has a sweet taste.
Learn more about MaltodextrinSodium 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 BenzoateIngredient Ratings
Here's what our community thinks of the ingredients in these products.
When to use
Under Your Skin Hair Growth Activating Serum 14 ingredients
The Ordinary Multi-Peptide Serum for Hair Density 36 ingredients
Reviews
Here's what our community thinks
Under Your Skin Hair Growth Activating Serum 14 ingredients
The Ordinary Multi-Peptide Serum for Hair Density 36 ingredients
It certainly has a positive effect. Even though I have sebderm it does not break me out much, even with all the oily ingredients.
It is not too hard to apply and overall I am happy
Unfortunately, this hair serum didn't work for me—it left my scalp greasy, itchy, and even caused dandruff.
