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
Onsen-Sui
Water
Skin ConditioningGlycerin
HumectantPropanediol
Solvent1,2-Hexanediol
Skin ConditioningCaprylic/Capric Triglyceride
MaskingPentylene Glycol
Skin ConditioningGlyceryl Acrylate/Acrylic Acid Copolymer
HumectantPanthenol
Skin ConditioningChondrus Crispus Extract
Skin ConditioningAcrylates/C10-30 Alkyl Acrylate Crosspolymer
Emulsion StabilisingSodium Lauroyl Lactylate
EmulsifyingHydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
Emulsion StabilisingSaccharum Officinarum Extract
MoisturisingTromethamine
BufferingCaprylyl Glycol
EmollientSodium Hyaluronate
HumectantAdenosine
Skin ConditioningAllantoin
Skin ConditioningEthylhexylglycerin
Skin ConditioningHyaluronic Acid
HumectantCeramide NP
Skin ConditioningPlumeria Alba Flower Oil
Sodium Phytate
Ceramide AP
Skin ConditioningPhytosphingosine
Skin ConditioningCholesterol
EmollientXanthan Gum
EmulsifyingHydrolyzed Hyaluronic Acid
HumectantCarbomer
Emulsion StabilisingHydroxypropyltrimonium Hyaluronate
Hydrolyzed Sodium Hyaluronate
Skin ConditioningSodium Acetylated Hyaluronate
HumectantPotassium Hyaluronate
Skin ConditioningCeramide EOP
Skin ConditioningTocopherol
AntioxidantDimethylsilanol Hyaluronate
HumectantSodium Benzoate
MaskingOnsen-Sui, Water, Glycerin, Propanediol, 1,2-Hexanediol, Caprylic/Capric Triglyceride, Pentylene Glycol, Glyceryl Acrylate/Acrylic Acid Copolymer, Panthenol, Chondrus Crispus Extract, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Sodium Lauroyl Lactylate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Saccharum Officinarum Extract, Tromethamine, Caprylyl Glycol, Sodium Hyaluronate, Adenosine, Allantoin, Ethylhexylglycerin, Hyaluronic Acid, Ceramide NP, Plumeria Alba Flower Oil, Sodium Phytate, Ceramide AP, Phytosphingosine, Cholesterol, Xanthan Gum, Hydrolyzed Hyaluronic Acid, Carbomer, Hydroxypropyltrimonium Hyaluronate, Hydrolyzed Sodium Hyaluronate, Sodium Acetylated Hyaluronate, Potassium Hyaluronate, Ceramide EOP, Tocopherol, Dimethylsilanol Hyaluronate, Sodium Benzoate
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.
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 preservatives
Adenosine is in every living organism. It is one of four components in nucleic acids that helps store our DNA.
Adenosine has many benefits when used. These benefits include hydrating the skin, smoothing skin, and reducing wrinkles. Once applied, adenosine increases collagen production. It also helps with improving firmness and tissue repair.
Studies have found adenosine may also help with wound healing.
In skincare products, Adenosine is usually derived from yeast.
Learn more about AdenosineAllantoin 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 AllantoinCaprylyl 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 GlycolChondrus Crispus Extract comes from a red algae native to the northern Atlantic coasts of Europe and North America. It helps hydrate the skin and is rich in antioxidants.
The antioxidants in chondrus crispus include lutein and zeaxanthin. Lutein has the ability to filter blue light from screens.
Other contents of chondrus crispus include polysaccharides, peptides, and amino acids. These help hydrate the skin.
What's the difference between algae and seaweed?
Algae is a broad term that includes seaweed. Not all algae is seaweed.
We don't have a description for Dimethylsilanol Hyaluronate yet.
Ethylhexylglycerin 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.
Plumeria Alba Flower Oil is an oil.
Potassium 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 HyaluronatePropanediol is an all-star ingredient. It softens, hydrates, and smooths the skin.
It’s often used to:
Propanediol is not likely to cause sensitivity and considered safe to use. It is derived from corn or petroleum with a clear color and no scent.
Learn more about PropanediolThis ingredient is also called sugarcane extract. It is a moisturizing humectant and has skin soothing properties.
Similar to hyaluronic acid, sugarcane can attract moisture to your skin.
Glycolic acid is a derivative of sugarcane. While glycolic acid is an AHA with exfoliating properties, sugarcane is not an AHA.
A study from 2021 found the compounds in sugarcane extract to have antioxidant, antimicrobial, and anti-inflammatory activity. The study also suggests these compounds can inhibit skin ageing enzymes and promote collagen synthesis.
Learn more about Saccharum Officinarum ExtractSodium 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 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 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 is a fat-soluble antioxidant known as Vitamin E.
You'll find this ingredient in the vast majority of skincare (for good reason). It works to neutralize free radicals, or unstable molecules generated by UV exposure, pollution, and other environmental stressors, before they can cause oxidative damage to your skin cells.
Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes.
It also acts as a skin conditioning agent; some studies show that regular topical use can improve the skin's water-binding capacity over 2-4 weeks.
This ingredient is especially loved for being a team player. When combined with Vitamin C, the photoprotective effect of both ingredients roughly doubles and the combo also helps reduce UV-induced DNA damage.
This ingredient has some brightening potential but it's more of a prevention ingredient than spot-fader. Cell studies show it can slow down melanin production but it's worth noting that it's not the most powerful brightener out there.
In formulations, it also serves as a stabilizer that helps protect other oxidation-prone ingredients from degrading.
Concentrations usually range from 0.1-1% in most leave-on products.
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 WaterAlso known as Japanese Hot Spring water. It's reported to exhibit anti-inflammatory effects and promote blood vessel dilation.