What's inside
What's inside
Key Ingredients
Benefits
Concerns
No concerns
Ingredients Side-by-side
Onsen-Sui
Water
Skin ConditioningNiacinamide
SmoothingButylene Glycol
Humectant1,2-Hexanediol
Skin ConditioningDipropylene Glycol
HumectantChondrus Crispus Extract
Skin ConditioningCaprylyl Glycol
EmollientSaccharum Officinarum Extract
MoisturisingBetaine
HumectantSodium Citrate
BufferingPropanediol
SolventPolyglyceryl-10 Laurate
Skin ConditioningSodium Hyaluronate
HumectantCitric Acid
BufferingAdenosine
Skin ConditioningAllantoin
Skin ConditioningHyaluronic Acid
HumectantPlumeria Alba Flower Oil
Ethylhexylglycerin
Skin ConditioningHydrolyzed Hyaluronic Acid
HumectantHydroxypropyltrimonium Hyaluronate
Hydrolyzed Sodium Hyaluronate
Skin ConditioningSodium Acetylated Hyaluronate
HumectantCaffeine
Skin ConditioningPotassium Hyaluronate
Skin ConditioningTocopherol
AntioxidantDimethylsilanol Hyaluronate
HumectantSodium Benzoate
MaskingOnsen-Sui, Water, Niacinamide, Butylene Glycol, 1,2-Hexanediol, Dipropylene Glycol, Chondrus Crispus Extract, Caprylyl Glycol, Saccharum Officinarum Extract, Betaine, Sodium Citrate, Propanediol, Polyglyceryl-10 Laurate, Sodium Hyaluronate, Citric Acid, Adenosine, Allantoin, Hyaluronic Acid, Plumeria Alba Flower Oil, Ethylhexylglycerin, Hydrolyzed Hyaluronic Acid, Hydroxypropyltrimonium Hyaluronate, Hydrolyzed Sodium Hyaluronate, Sodium Acetylated Hyaluronate, Caffeine, Potassium Hyaluronate, Tocopherol, Dimethylsilanol Hyaluronate, Sodium Benzoate
Water
Skin ConditioningButylene Glycol
Humectant1,2-Hexanediol
Skin ConditioningDimethyl Sulfone
SolventPolyglyceryl-10 Laurate
Skin ConditioningGlycerin
HumectantCarbomer
Emulsion StabilisingArginine
MaskingHydroxyethylcellulose
Emulsion StabilisingXanthan Gum
EmulsifyingAllantoin
Skin ConditioningHydrolyzed Hyaluronic Acid
HumectantPolyquaternium-51
Skin ConditioningBeta-Glucan
Skin ConditioningPanthenol
Skin ConditioningSqualane
EmollientCaprylyl Glycol
EmollientCamellia Sinensis Leaf Water
MaskingTocopherol
AntioxidantCentella Asiatica Extract
CleansingLactobionic Acid
BufferingBifida Ferment Lysate
Skin ConditioningSodium Hyaluronate
HumectantArtemisia Capillaris Extract
Houttuynia Cordata Extract
Skin ConditioningHydroxypropyltrimonium Hyaluronate
Madecassoside
AntioxidantSodium Acetylated Hyaluronate
HumectantHyaluronic Acid
HumectantHydrolyzed Sodium Hyaluronate
Skin ConditioningSodium Hyaluronate Crosspolymer
HumectantPotassium Hyaluronate
Skin ConditioningSodium Phytate
Ethylhexylglycerin
Skin ConditioningWater, Butylene Glycol, 1,2-Hexanediol, Dimethyl Sulfone, Polyglyceryl-10 Laurate, Glycerin, Carbomer, Arginine, Hydroxyethylcellulose, Xanthan Gum, Allantoin, Hydrolyzed Hyaluronic Acid, Polyquaternium-51, Beta-Glucan, Panthenol, Squalane, Caprylyl Glycol, Camellia Sinensis Leaf Water, Tocopherol, Centella Asiatica Extract, Lactobionic Acid, Bifida Ferment Lysate, Sodium Hyaluronate, Artemisia Capillaris Extract, Houttuynia Cordata Extract, Hydroxypropyltrimonium Hyaluronate, Madecassoside, Sodium Acetylated Hyaluronate, Hyaluronic Acid, Hydrolyzed Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Potassium Hyaluronate, Sodium Phytate, Ethylhexylglycerin
Reviews
Ingredients Explained
These ingredients are found in both products.
Ingredients higher up in an ingredient list are typically present in a larger amount.
1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse.Â
It is a:
- Humectant, drawing moisture into the skin
- Emollient, helping to soften skin
- Solvent, dispersing and stabilizing formulas
- Preservative booster, enhancing the antimicrobial activity of other preservativesÂ
Allantoin is a soothing ingredient known for its protective and moisturizing properties; it's basically a quiet workhorse ingredient you can find in a huge range of cosmetics.
Though it can be derived from the comfrey plant, allantoin is produced synthetically for cosmetic products to ensure purity.
Research shows it can encourage your skin cells to turn over and renew by stimulating keratinocyte and fibroblast proliferation.
It also has mild keratolytic properties to help loosen and shed dead skin cells without being harsh.
Studies also suggest allantoin can help calm inflammation by dialing down some of the chemical signals your skin sends out when it is irritated.
This ingredient is typically used in the 0.1-0.5% range, and the FDA recognizes it as a skin protectant in OTC products up to 2%.
Overall, allantoin is a wonderful addition to most routines; it is stable across a wide pH range (~4-8), works well with other ingredients, and is considered non-sensitizing/non-irritating.
Fun fact: Allantoin is naturally occurring in comfrey root, beets, chamomile, and wheat sprouts. Our bodies even produce it as a byproduct of uric acid metabolism.
Learn more about AllantoinButylene 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 GlycolCaprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created.
Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin.
Because it is not a free-fatty acid or alcohol, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on).
Learn more about Caprylyl GlycolEthylhexylglycerin is created from glycerin. It is a multitasker ingredient that:
The CIR Expert Panel found minimal skin absorption or sensitization of any kind in a safety assessment. Though this ingredient is considered well-tolerated, a small number of cases of allergic dermatitis have been published since 2002. Just be sure to patch test if you are unsure.
Industry-reported use ranges from 8% in rinse-off products and 2% in leave-on formulations.
Learn more about EthylhexylglycerinHyaluronic acid (HA) is a glycosaminoglycan (basically a long sugar chain) that your skin already makes on its own. In your skin, HA lives in the extracellular matrix and acts as the body's moisture reservoir.
Topically, HA is a humectant that binds water and helps skin look more plump, smooth, and hydrated.
The only catch is that HA isn't a single thing; it actually comes in a wide range of molecular weights (~50 - 2,000+ kDA) and size matters.
Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair.
This is why the best HA serums blend the two sizes together so you get the best of both worlds.
The majority of cosmetic HA is produced by bacterial fermentation, typically using Streptococcus or Bacillus strains. Typical use levels in skincare sit around 0.1-2%.
A clinical study using a 0.2% low-molecular weight HA gel showed improvement in facial seborrheic dermatitis with excellent tolerance.
These are some other common types of Hyaluronic Acid:
Learn more about Hyaluronic AcidHydrolyzed Hyaluronic Acid is hyaluronic acid (HA) that is broken down into lower molecular weight fragments.
It's a humectant that pulls and holds water in the skin to help with hydration, plumpness, and reduce transepidermal water loss.
Because hydrolyzed hyaluronic acid is smaller in size, it can slip past your outermost layer of skin more easily than full-sized HA.
Most formulations will combine all sizes to get the best of both worlds.
Typical usage levels range from 0.01-1%. Any percentage higher than 2% might become goopy and tacky.
Learn more about Hydrolyzed Hyaluronic AcidThis ingredient is created by putting sodium hyaluronate through hydrolysis.
You might know this as 'mini' or 'ultra low-molecular weight' hyaluronic acid. The small molecule size means it is able to travel deeper in the skin.
According to studies, low molecular-weight hyaluronic acid can:
One study from 2011 found ultra-low weight HA to show pro-inflammatory properties. Another study from 2022 found it to downregulate UV-B induced inflammation.
Hydrolysis is a process of changing a molecule using water or enzymes.
This ingredient is water-soluble.
Learn more about Hydrolyzed Sodium HyaluronateThis form of hyaluronic acid is produced through fermentation.
According to a manufacturer, it has a positive charge by ionic binding to help moisturize and give hair a smooth feel. This is why you'll find this ingredient in shampoos and body washes.
Polyglyceryl-10 Laurate is a cleansing agent and emulsifier.
It rounds up dirt, oil, and grime, so they can be rinsed off easily as a cleanser. On the emulsifier side, it keeps your formula smooth and well-mixed by playing peacekeeper for ingredients that don't naturally get along (like oil and water).
Because it has a C12 (lauric acid) fatty acid chain, this ingredient can potentially feed the Malassezia yeast that causes fungal acne. The Malassezia yeast prefers esters with C11-C24 fatty acids If you're prone to flare-ups, you might want to patch-test or skip this one.
This ingredient is an ester of lauric acid and Polyglycerin-10.
Learn more about Polyglyceryl-10 LauratePotassium hyaluronate (PH) is a salt form of hyaluronic acid and has similar skin hydrating benefits.
Similar to hyaluronic acid, PH is able to draw and hold moisture to your skin. This helps keep skin soft and hydrated.
Fun fact: PH is used in eye drops and injectable treatments for joint disorders. It has lubricating and tissue-repair properties.
Learn more about Potassium HyaluronateSodium Acetylated Hyaluronate is a type of Hyaluronic Acid.
Hyaluronic Acids help moisturize, soothe, and protect the skin.
Read about common types of Hyaluronic Acid here:
Learn more about Sodium Acetylated HyaluronateSodium 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.
Learn more about Sodium HyaluronateTocopherol (also known as Vitamin E) is a common antioxidant used to help protect the skin from free-radicals and strengthen the skin barrier. It's also fat soluble - this means our skin is great at absorbing it.
Vitamin E also helps keep your natural skin lipids healthy. Your lipid skin barrier naturally consists of lipids, ceramides, and fatty acids. Vitamin E offers extra protection for your skin’s lipid barrier, keeping your skin healthy and nourished.
Another benefit is a bit of UV protection. Vitamin E helps reduce the damage caused by UVB rays. (It should not replace your sunscreen). Combining it with Vitamin C can decrease sunburned cells and hyperpigmentation after UV exposure.
You might have noticed Vitamin E + C often paired together. This is because it is great at stabilizing Vitamin C. Using the two together helps increase the effectiveness of both ingredients.
There are often claims that Vitamin E can reduce/prevent scarring, but these claims haven't been confirmed by scientific research.
Learn more about TocopherolWater. 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!
Learn more about Water