Skin science article
Dear, Klairs Fundamental Water Gel Cream Versus Beauty of Joseon Dynasty Cream (Old Formulation)
Dear, Klairs Fundamental Water Gel Cream Versus Beauty of Joseon Dynasty Cream (Old Formulation) This calming moisturizer is formulated around Panthenol and Camellia Sinensis Leaf Extract to calm redness and hydrate skin. This barrier-repair moisturizer is for
Dear, Klairs Fundamental Water Gel Cream Versus Beauty of Joseon Dynasty Cream (Old Formulation)
This calming moisturizer is formulated around Panthenol and Camellia Sinensis Leaf Extract to calm redness and hydrate skin.
This barrier-repair moisturizer is formulated around Niacinamide and Adenosine to strengthen the skin barrier and hydrate skin.
What's inside
Key Ingredients
Benefits
Concerns
Ingredients Side-by-side
Camellia Sinensis Leaf Water
Butylene Glycol
Glycerin
Water
Ethylhexyl Palmitate
Cetyl Ethylhexanoate
1,2-Hexanediol
Pentaerythrityl Tetraethylhexanoate
Panthenol
Oryza Sativa Extract
Hibiscus Esculentus Fruit Extract
Camellia Sinensis Leaf Extract
Laminaria Japonica Extract
Artemisia Vulgaris Extract
Centella Asiatica Extract
Rosmarinus Officinalis Leaf Extract
Phytosphingosine
Caproyl Sphingosine
Tocopherol
Glyceryl Glucoside
Hydrolyzed Hyaluronic Acid
Trehalose
Jojoba Esters
Helianthus Annuus Seed Oil
Hydrolyzed Jojoba Esters
Glyceryl Acrylate/Acrylic Acid Copolymer
Cetyl Alcohol
Hydrogenated Lecithin
Ammonium Acryloyldimethyltaurate/Vp Copolymer
Hydrogenated Polydecene
Ethylhexylglycerin
Cyclohexasiloxane
Camellia Sinensis Leaf Water, Butylene Glycol, Glycerin, Water, Ethylhexyl Palmitate, Cetyl Ethylhexanoate, 1,2-Hexanediol, Pentaerythrityl Tetraethylhexanoate, Panthenol, Oryza Sativa Extract, Hibiscus Esculentus Fruit Extract, Camellia Sinensis Leaf Extract, Laminaria Japonica Extract, Artemisia Vulgaris Extract, Centella Asiatica Extract, Rosmarinus Officinalis Leaf Extract, Phytosphingosine, Caproyl Sphingosine, Tocopherol, Glyceryl Glucoside, Hydrolyzed Hyaluronic Acid, Trehalose, Jojoba Esters, Helianthus Annuus Seed Oil, Hydrolyzed Jojoba Esters, Glyceryl Acrylate/Acrylic Acid Copolymer, Cetyl Alcohol, Hydrogenated Lecithin, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Hydrogenated Polydecene, Ethylhexylglycerin, Cyclohexasiloxane
Niacinamide
Dipentaerythrityl Hexa C5-9 Acid Esters
Sodium Hyaluronate
Xanthan Gum
Cyclopentasiloxane
Polyacrylate-13
Polyisobutene
Polysorbate 20
C14-28 Alkyl Acid
Stearyl Alcohol
Behenyl Alcohol
Dimethicone/Vinyl Dimethicone Crosspolymer
Dimethicone
Adenosine
Glyceryl Stearate Se
Cetearyl Alcohol
Polyglyceryl-3 Methylglucose Distearate
Cetyl PEG/PPG-10/1 Dimethicone
Stearic Acid
Tocopheryl Acetate
Sodium Polyacrylate
Olea Europaea Fruit Oil
Hippophae Rhamnoides Oil
Argania Spinosa Kernel Oil
Butyrospermum Parkii Butter
Ceramide NP
Calendula Officinalis Flower Extract
Caprylhydroxamic Acid
Raphanus Sativus Leaf Extract
Oryza Sativa Bran Extract
Cucurbitaceae Extract
Orchid Extract
Honey Extract
Panax Ginseng Root Extract
Carthamus Tinctorius Seed Oil
Ceteareth-20
Glyceryl Citrate/Lactate/Linoleate/Oleate
Parfum
Water, Glycerin, Butylene Glycol, Niacinamide, Dipentaerythrityl Hexa C5-9 Acid Esters, Sodium Hyaluronate, Xanthan Gum, Cyclopentasiloxane, Cyclohexasiloxane, Polyacrylate-13, Polyisobutene, Polysorbate 20, Hydrogenated Lecithin, C14-28 Alkyl Acid, Stearyl Alcohol, Behenyl Alcohol, Dimethicone/Vinyl Dimethicone Crosspolymer, Dimethicone, Adenosine, Glyceryl Stearate Se, Cetearyl Alcohol, Polyglyceryl-3 Methylglucose Distearate, Cetyl PEG/PPG-10/1 Dimethicone, Stearic Acid, Tocopheryl Acetate, Sodium Polyacrylate, Olea Europaea Fruit Oil, Helianthus Annuus Seed Oil, Centella Asiatica Extract, Hippophae Rhamnoides Oil, Argania Spinosa Kernel Oil, Butyrospermum Parkii Butter, Ceramide NP, Trehalose, Calendula Officinalis Flower Extract, Caprylhydroxamic Acid, 1,2-Hexanediol, Raphanus Sativus Leaf Extract, Oryza Sativa Bran Extract, Cucurbitaceae Extract, Orchid Extract, Honey Extract, Panax Ginseng Root Extract, Carthamus Tinctorius Seed Oil, Phytosphingosine, Ceteareth-20, Glyceryl Citrate/Lactate/Linoleate/Oleate, Parfum
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.
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
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.
Centella Asiatica Extract (Centella) is one of the most researched botanical extracts in skincare with decades of studies backing its effects on inflammation, collagen, and the skin barrier.
That research keeps pointing back to the same four triterpenoid saponins: Asiaticoside, Madecassoside, Asiatic Acid, and Madecassic Acid.
These compounds allow centella to dial back inflammation, encourage the skin to build and hold onto collagen, support the barrier and hydration, and bring solid antioxidant activity to protect against signs of aging.
Centella also carries a nice supporting cast of Vitamin A, vitamin C, several B vitamins, and amino acids. Put it all together and you get an ingredient that soothes, hydrates, and protects, all at once.
Most of centella's magic comes from the four big compounds (Asiaticoside, Madecassoside, Asiatic Acid, and Madecassic Acid). These are the actives doing the heavy lifting in almost every centella study.
Here is the short version of what they do in the skin:
So it is not just soothing for the sake of soothing. Centella calms the skin AND helps it rebuild.
Just FYI, not all centella on an ingredient list is the same. What you are getting actually depends on the extract:
Fun fact on the ratios: the leaves tend to be richest in Madecassoside and Asiaticoside, and lower in the two acids. The exact amounts shift with where the plant is grown and how it is processed. This means purity really does vary brand to brand.
Centella is one of the most easygoing actives out there.
It layers well with basically everything: niacinamide, hyaluronic acid, peptides, and vitamin C, and also pairs nicely with stronger actives like retinoids and exfoliating acids where it can help take the edge off irritation.
On the safety side, centella and its triterpenes are classified as weak sensitizers, meaning allergic reactions are possible but uncommon.
Patch tests at 1% and 5% came back negative in test panels, and creams at typical use levels did not cause allergic reactions across large groups of people.
But as with any new active, a patch test is still a smart move for very reactive skin.
Centella is widely used because it is effective at low percentages. For context, human safety testing found no meaningful irritation from creams containing centella extract at everyday use levels (the tested amounts were well under 1%).
The irritancy threshold in animal testing was also above 30% (so real-world formulas sit far below anything concerning).
In collagen lab studies, higher concentrations drove more collagen synthesis, so serums built around centella tend to feature it more prominently.
Bottom line: you will find centella working nicely anywhere from a fraction of a percent up to hero-ingredient levels depending on whether it is a supporting soother or the main event.
Fun fact: Centella has been used as a medicine and in food for many centuries. As a medicine, it is used to treat burns, scratches, and wounds.
Cyclohexasiloxane is a type of silicone more commonly known as D6. It is an emollient and solvent.
Cyclohexasiloxane is used to evenly distribute ingredients throughout the product. When applied to the skin, Cyclohexasiloxane evaporates and leaves behind a silky feel.
As an emollient, it can help the skin feel soft and hydrated. It is also used to reduce frizz in hair products.
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.
Helianthus Annuus Seed Oil is a plant oil derived from the seeds of a sunflower.
It is rich in fatty acids, primarily linoleic acid and oleic acid. This gives it emollient and skin conditioning properties.
The reason this ingredient is so effective is because it forms a thin film on the skin that reduces transepidermal water loss (TEWL) while supplying linoleic acid to the stratum corneum to improve barrier strength.
The high linoleic acid content is particularly noteworthy for acne-prone skin.
Research suggests that acne-prone skin tends to be deficient in linoleic acid in sebum. Topical application may help replenish this to support a healthier follicular environment and less comedone-promoting sebum.
One randomized study found sunflower seed oil preserved skin barrier integrity in adult volunteers with and without atopic dermatitis (outperforming olive oil).
This ingredient is well-studied, gentle, and an effective emollient suitable for most skin types.
On fungal acne: This ingredient may not be Fungal acne (Malassezia folliculitis) safe. This is because it contains fatty acids with carbon chain lengths in the C11-C24 range.
Hydrogenated Lecithin is a more stable version of lecithin.
It's made by taking lecithin (a phospholipid commonly found in soybeans and egg yolks) and hydrogenating it. This just means the unsaturated fatty acids are turned into saturated ones so they don't go bad as easily.
This ingredient is an emollient, emulsifier, and penetration enhancer. As an emollient, it helps soften and hydrate skin by trapping moisture within. As an emulsifier, it prevents oil and water ingredients from separating.
Hydrogenated Lecithin can form tiny spherical structures made of phospholipid bilayers called liposomes. These liposomes are able to capture compounds inside their structure and deliver them through the skin barrier.
Because phospholipids are a natural component of our cell membranes, this ingredient is inherently compatible with skin.
A 2021 study found lecithin-based surfactants were less harsh and more tolerable comared to Sodium Lauryl Sulfate (SLS).
Phytosphingosine is a phospholipid naturally found in our skin as a building block for ceramides.. It helps moisturize, soothe, and protect skin.
Phytosphingosine contributes to your skin's natural moisturizing factor (NMF). The NMF is responsible for hydration, a strong barrier, and plasticity. Our NMF decreases with age. Increasing NMF leads to more healthy and hydrated skin.
Studies show products formulated with NMF ingredients help strengthen our skin's barrier. Having a healthy skin barrier reduces irritation and increases hydration. Our skin barrier is responsible for having plump and firm skin. It also helps protect our skin against infection, allergies, and inflammation.
Fun fact: Phytosphingosine is abundant in plants and fungi.
More ingredients that help boost collagen in skin:
Trehalose is a disaccharide made of two glucose molecules (glucose is sugar!). Trehalose is used to help moisturize skin. It also has antioxidant properties.
As a humectant, trehalose helps draw moisture from the air to your skin. This helps keep your skin hydrated.
Due to its antioxidant properties, trehalose may help with signs of aging. Antioxidants help fight free-radical molecules, unstable molecules that may damage your skin.
In medicine, trehalose and hyaluronic acid are used to help treat dry eyes.
Some animals, plants, and bacteria create trehalose as a source of energy to survive freeze or lack of water.
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!