Skin science article
The Ordinary Multi-Peptide + HA Serum Versus e.l.f. cosmetics Holy Hydration! Triple Bounce Serum
The Ordinary Multi-Peptide + HA Serum Versus e.l.f. cosmetics Holy Hydration! Triple Bounce Serum This anti-aging serum is formulated around Lactococcus Ferment Lysate and Acetyl Hexapeptide-8 to soften the look of wrinkles and hydrate skin. This hydrating ser
The Ordinary Multi-Peptide + HA Serum Versus e.l.f. cosmetics Holy Hydration! Triple Bounce Serum
This anti-aging serum is formulated around Lactococcus Ferment Lysate and Acetyl Hexapeptide-8 to soften the look of wrinkles and hydrate skin.
This hydrating serum is formulated around Hydrolyzed Sodium Hyaluronate and Sodium Hyaluronate to hydrate skin and strengthen the skin barrier.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Water
Glycerin
Lactococcus Ferment Lysate
Acetyl Hexapeptide-8
Pentapeptide-18
Palmitoyl Tripeptide-1
Palmitoyl Tetrapeptide-7
Palmitoyl Tripeptide-38
Dipeptide Diaminobutyroyl Benzylamide Diacetate
Acetylarginyltryptophyl Diphenylglycine
Sodium Hyaluronate Crosspolymer
Sodium Hyaluronate
Allantoin
Glycine
Alanine
Serine
Valine
Isoleucine
Proline
Threonine
Histidine
Phenylalanine
Arginine
Aspartic Acid
Trehalose
Fructose
Glucose
Maltose
Urea
Sodium PCA
PCA
Sodium Lactate
Citric Acid
Hydroxypropyl Cyclodextrin
Sodium Chloride
Sodium Hydroxide
Butylene Glycol
Pentylene Glycol
Acacia Senegal Gum
Xanthan Gum
Carbomer
Polysorbate 20
PPG-26-Buteth-26
PEG-40 Hydrogenated Castor Oil
Trisodium Ethylenediamine Disuccinate
Ethoxydiglycol
Sodium Benzoate
Caprylyl Glycol
Ethylhexylglycerin
Phenoxyethanol
Chlorphenesin
Water, Glycerin, Lactococcus Ferment Lysate, Acetyl Hexapeptide-8, Pentapeptide-18, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-38, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Acetylarginyltryptophyl Diphenylglycine, Sodium Hyaluronate Crosspolymer, Sodium Hyaluronate, Allantoin, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Arginine, Aspartic Acid, Trehalose, Fructose, Glucose, Maltose, Urea, Sodium PCA, PCA, Sodium Lactate, Citric Acid, Hydroxypropyl Cyclodextrin, Sodium Chloride, Sodium Hydroxide, Butylene Glycol, Pentylene Glycol, Acacia Senegal Gum, Xanthan Gum, Carbomer, Polysorbate 20, PPG-26-Buteth-26, PEG-40 Hydrogenated Castor Oil, Trisodium Ethylenediamine Disuccinate, Ethoxydiglycol, Sodium Benzoate, Caprylyl Glycol, Ethylhexylglycerin, Phenoxyethanol, Chlorphenesin
Hydrolyzed Sodium Hyaluronate
Niacinamide
Squalane
Panthenol
1,2-Hexanediol
Hydroxyacetophenone
Coceth-7
PPG-1-PEG-9 Lauryl Glycol Ether
Water, Glycerin, Butylene Glycol, Hydrolyzed Sodium Hyaluronate, Sodium Hyaluronate, Niacinamide, Squalane, Panthenol, 1,2-Hexanediol, Hydroxyacetophenone, Coceth-7, PPG-1-PEG-9 Lauryl Glycol Ether, PEG-40 Hydrogenated Castor Oil, Citric Acid
Reviews
Alternatives
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.
Citric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes.
Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath.
However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products.
Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH.
In skincare formulas, citric acid can:
While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants.
Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations.
Rosacea skin has a lower threshold for acids generally, with 62.5% of rosacea subjects in one study reacting to lactic acid in a sting test. This is why we mark citric acid as a potential rosacea trigger.
However, this ingredient shows up as a pH adjuster or chelator at roughly 0.1-1% in many products. These low levels are unlikely to be an issue for rosacea skin and becomes a potential trigger at exfoliating concentrations (20%). Because everybody's skin is unique, we recommend a patch test if you are unsure.
Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum.
Topically, glycerin does several things at once:
Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3.
Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin.
This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products.
Just know very high concentrations (>40%) can feel tacky in low humidity.
Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.
PEG-40 Hydrogenated Castor Oil is an emulsifier derived from castor oil.
As an emulsifying agent, it helps other ingredients like fragrances and fat-soluble vitamins dissolve cohesively.
Due to its large molecule size, it doesn't penetrate beyond the skin's surface.
This ingredient has a solid regulatory track record; the CIR Expert Panel first concluded it was safe for use in cosmetics at concentrations up to 100% in 1997. A 2012 reassessment reaffirmed that finding. Safety studies have also found no irritation or evidence of toxicity.
A 2019 study did find this ingredient to grow Malassezia, so this ingredient may not be fungal acne safe.
Sodium Hyaluronate is the salt form of hyaluronic acid. It is a long sugar chain that is naturally found in your skin, joints, and connective tissue that maintains hydration and elasticity.
In skincare, it works as a humectant. It pulls water from the environment and deeper layers of skin and binds it to the surface.
Interestingly, the size of the molecule affects its behavior:
Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.
Many serums use a blend of both weights so you can get surface hydration plus longer-lasting and deeper effects.
You'll typically see concentrations between 0.1-2% for this ingredient.
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. Remember to stay hydrated!