Peptide Skincare & BeautySkin science and ingredient guides

Skin science article

Beauty of Joseon Revive Eye Serum : Ginseng + Retinal Versus Laneige Bouncy + Firm Sleeping Mask

Beauty of Joseon Revive Eye Serum : Ginseng + Retinal Versus Laneige Bouncy + Firm Sleeping Mask This anti-aging eye moisturizer is formulated around Panax Ginseng Root Extract and Niacinamide to soften the look of wrinkles and refine skin texture. This hydrat

Beauty of Joseon Revive Eye Serum : Ginseng + Retinal Versus Laneige Bouncy + Firm Sleeping Mask

This anti-aging eye moisturizer is formulated around Panax Ginseng Root Extract and Niacinamide to soften the look of wrinkles and refine skin texture.

This hydrating overnight mask is formulated around Squalane and Adenosine to hydrate skin and soften the look of wrinkles.

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Water

Panax Ginseng Root Extract

Glycerin

Dipropylene Glycol

Caprylic/Capric Triglyceride

1,2-Hexanediol

Pentaerythrityl Tetraethylhexanoate

Niacinamide

Butylene Glycol Dicaprylate/Dicaprate

Cetearyl Alcohol

Sorbitan Olivate

Cetearyl Olivate

Butylene Glycol

Hydrogenated Lecithin

Tromethamine

Carbomer

Glyceryl Stearate

Macadamia Ternifolia Seed Oil

Adenosine

Theobroma Cacao Extract

Dextrin

Cholesterol

Polyglyceryl-10 Oleate

Retinal

Brassica Campestris Sterols

Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate

Silica

Sodium Hyaluronate

Tocopherol

Aluminum/Magnesium Hydroxide Stearate

Potassium Cetyl Phosphate

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

Ceramide NP

Palmitoyl Tripeptide-5

Disodium EDTA

Ethylhexylglycerin

Water, Panax Ginseng Root Extract, Glycerin, Dipropylene Glycol, Caprylic/Capric Triglyceride, 1,2-Hexanediol, Pentaerythrityl Tetraethylhexanoate, Niacinamide, Butylene Glycol Dicaprylate/Dicaprate, Cetearyl Alcohol, Sorbitan Olivate, Cetearyl Olivate, Butylene Glycol, Hydrogenated Lecithin, Tromethamine, Carbomer, Glyceryl Stearate, Macadamia Ternifolia Seed Oil, Adenosine, Theobroma Cacao Extract, Dextrin, Cholesterol, Polyglyceryl-10 Oleate, Retinal, Brassica Campestris Sterols, Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate, Silica, Sodium Hyaluronate, Tocopherol, Aluminum/Magnesium Hydroxide Stearate, Potassium Cetyl Phosphate, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Ceramide NP, Palmitoyl Tripeptide-5, Disodium EDTA, Ethylhexylglycerin

Dimethicone

Squalane

Diisostearyl Malate

C12-16 Alcohols

Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer

Palmitic Acid

Dimethicone/Vinyl Dimethicone Crosspolymer

Sodium Polyacrylate Starch

Stearic Acid

Hydroxypropyl Bispalmitamide Mea

Mannitol

Lactobacillus Ferment Lysate

Propanediol

Ammonium Acryloyldimethyltaurate/Vp Copolymer

Cetearyl Glucoside

Xanthan Gum

Glyceryl Caprylate

Allantoin

Parfum

Acrylates/Ammonium Methacrylate Copolymer

Caprylyl Glycol

Linalool

Malachite Extract

Citronellol

Geraniol

Hydroxycitronellal

Carthamus Tinctorius Flower Extract

Benzyl Salicylate

Cyanocobalamin

Hydrolyzed Collagen

Paeonia Albiflora Root Extract

Hydrolyzed Hyaluronic Acid

Acetyl Tetrapeptide-2

Sodium Hyaluronate Crosspolymer

Hyaluronic Acid

Paeonia Albiflora Flower Extract

Sodium Acetylated Hyaluronate

Water, Butylene Glycol, Glycerin, Dimethicone, 1,2-Hexanediol, Squalane, Diisostearyl Malate, C12-16 Alcohols, Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer, Cetearyl Alcohol, Palmitic Acid, Hydrogenated Lecithin, Dimethicone/Vinyl Dimethicone Crosspolymer, Sodium Polyacrylate Starch, Stearic Acid, Hydroxypropyl Bispalmitamide Mea, Mannitol, Lactobacillus Ferment Lysate, Propanediol, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Cetearyl Glucoside, Xanthan Gum, Glyceryl Caprylate, Disodium EDTA, Ethylhexylglycerin, Allantoin, Adenosine, Parfum, Acrylates/Ammonium Methacrylate Copolymer, Caprylyl Glycol, Carbomer, Cholesterol, Linalool, Silica, Malachite Extract, Citronellol, Geraniol, Hydroxycitronellal, Carthamus Tinctorius Flower Extract, Dextrin, Benzyl Salicylate, Cyanocobalamin, Hydrolyzed Collagen, Sodium Hyaluronate, Paeonia Albiflora Root Extract, Tocopherol, Hydrolyzed Hyaluronic Acid, Acetyl Tetrapeptide-2, Sodium Hyaluronate Crosspolymer, Hyaluronic Acid, Paeonia Albiflora Flower Extract, Sodium Acetylated Hyaluronate

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

Adenosine is a purine nucleoside that your body already makes in every cell. In skincare, it acts mainly as a skin conditioning and anti-aging agent.

The way it works is fairly well mapped out:

Your skin has cells called fibroblasts that build collagen (the stuff that keeps skin firm and smooth). Adenosine basically flips a switch on these cells that tells them to get to work making more collagen and other proteins. These cells slow down on their own as skin ages, so Adenosine helps give them a little nudge to keep going.

The clinical backing is pretty solid too.

A blind, randomized, placebo-controlled trial of 126 women aged 45-65 tested a 0.1% cream twice daily and found real improvements in crow's feet and frown lines using a precise 3D skin-mapping technique; these changes showed up by week 3 and held at 2 months.

A later study using Adenosine-loaded dissolving microneedle patches reported gains in wrinkle depth, dermal density, elasticity, and hydration.

On concentrations, South Korea's Ministry of Food and Drug Safety has set 0.04% as the approved functional anti-wrinkle level. You'll typically see this ingredient used somewhere in the 0.04-0.1% range since it works at low doses.

This ingredient has been found safe for cosmetics with the data showing no irritation or sensitization.

Overall, this is a great ingredient for any anti-aging routine and has no photosensitizing effect, so it suits both AM and PM use.

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.

Carbomer is a synthetic thickening and gelling agent. It's basically the ingredient that gives a lot of serums, gels, creams, and sunscreens their smooth, non-sticky texture.

Although legally permitted at very high levels, carbomers are normally used at concentrations below 1%.

It also needs to be neutralized to actually thicken, and because it is a large molecule, it doesn't really penetrate the skin barrier.

Allergy-wise, the risk is very low. Clinical studies show carbomers have low potential for skin irritation/sensitization even at concentrations up to 100%.

A 2024 UK study patch-tested 1,302 patients and found true allergy to the parent group of carbomer to be rare with no confirmed relevant reactions.

Cetearyl alcohol is a waxy mixture of two fatty alcohols: cetyl alcohol and stearyl alcohol. It is an emollient and emulsifier.

Despite having "alcohol" in its name, it has nothing to do with drying solvent alcohols; the FDA also allows "alcohol-free" products to contain fatty alcohols like this ingredient.

It plays several roles in a formula:

Typical use levels for this ingredient sit around 1-10% and the Cosmetic Ingredient Review Expert Panel has affirmed safety at concentrations up to 25% in leave-on products.

Multiple assessments have found it to be non-irritating and non-sensitizing to most people.

However, there have been some cases of allergic contact dermatitis in patients with chronically compromised skin barriers.

Cetearyl alcohol has a comedogenic rating of 2 and irritancy rating of 1. Both of these numbers come from the 1989 study that used rabbit ears; a "2" means mildly comedogenic and a "1" means low irritancy.

Here's the catch: rabbit skin is more sensitive than human skin and throws a lot of false positives. A 1996 reappraisal found that ingredients rated 1-2 in the rabbit ear tests are generally safe for humans.

Remember comedogenic ratings are unable to assess the entire formula of a product or how it will react on your skin. Just be sure to patch test if you are unsure about certain ingredients.

This ingredient is not fungal acne safe. Cetearyl alcohol is a fatty alcohol with chain lengths that fall within the range that Malassezia can metabolize.

A 2019 study has also observed Malassezia growth in the presence of this ingredient, confirming it to be not-fungal acne safe.

Cholesterol is a lipid that is naturally found in human skin and is one of the three key components of your skin barrier. In skincare, it is an emollient and barrier-repairing ingredient.

It works by fitting directly into the lipid layers of skin to help restore structure and reduce transepidermal water loss (TEWL).

This is a great ingredient for dry, compromised, or aging skin; our skin starts to produce less cholesterol with age.

Research shows cholesterol works best in combination with ceramides and fatty acids, the other two major components in your skin barrier.

Cholesterol is also a well-establish penetration enhancer and can help other actives absorb more effectively.

Cosmetic-grade cholesterol is usually derived from lanolin but plant and synthetic options also exist. We recommend reaching out to the brand if you have questions about their source of cholesterol.

Dextrin is a starch-derived polysaccharide. It's made by partially breaking down corn, potato, or other plant starches.

Think of it as "half-processed" starch; it's less complex than the original but not fully broken down into sugar like maltodextrin.

In cosmetics, it mainly functions as a bulking agent, viscosity controller, binder, and absorbent. It helps thicken products, stabilize powders, and get certain textures a less "wet" feel.

This ingredient has a pretty solid safety profile; it's recognized as a safe food additive and its large molecular size means it doesn't meaningfully penetrate skin.

Human repeat insult patch tests using a rinse-off facial product containing 42.69% dextrin found no skin irritation or sensitization in 54 subjects.

Typical real-world usage is much lower: usually under 1% as a texture modifier and up to 40% in masks (rinse off products use less).

Disodium EDTA is a chelating agent. It grabs onto and deactivates metal ions that sneak into your products from water, packaging, or air.

This ingredient mainly works behind the scenes and helps with:

On top of that, this ingredient can counteract the effects of hard water by binding to the minerals in it.

One thing worth knowing is that Disodium EDTA has been shown to be a mild penetration enhancer. It can help other ingredients absorb into skin more effectively which can be a double-edged sword (great for actives, but can also make the active too strong if you have sensitive skin).

Clinical patch testing showed no significant skin irritation at typical use concentrations and minimal dermal absorption.

You'll most likely see this ingredient near the end of an ingredient list. It's typically found in concentrations less than 1%.

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.

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.

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).

Silica, also known as silicon dioxide, is a naturally occurring mineral. It is used as a fine, spherical, and porous powder in cosmetics.

Though it has exfoliant properties, the function of silica varies depending on the product.

The unique structure of silica enhances the spreadability and adds smoothness, making it a great texture enhancer.

It is also used as an active carrier, emulsifier, and mattifier due to its ability to absorb excess oil.

In some products, tiny microneedles called spicules are made from silica or hydrolyzed sponge. When you rub them in, they lightly polish away dead skin layers and enhance the penetration of active ingredients.

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.

Tocopherol 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.

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!

Similar Comparisons

The reference edit

Ingredients, questions
& further reading.

Connected source records selected through this article’s public topic index.

01

Formula cabinet

Ingredients & structured notes

Ingredient index

Ingredients Explained

  1. 01These ingredients are found in both products.
  2. 02Ingredients higher up in an ingredient list are typically present in a larger amount.
  3. 03This ingredient is also known as basil oil or basil essential oil. It is primarily used to add a fragrance or mask the odor of other ingredients.
  4. 04The main bioactive compounds in it are linalool and eugenol. These are EU-regulated fragrance allergens; this just means a small percentage of people with existing fragrance sensitivities should patch test.
  5. 05In-vitro studies have demonstrated activity against acne-causing bacteria.
  6. 06This ingredient is also known as olive oil. It has been used in skincare for centuries and science largely backs up its reputation as a nourishing emollient.
  7. 07The main components of olive oil are oleic acid (55-83%), linoleic acid (3.5-20%), and palmitic acid (7-20%). Oleic acid promotes skin regeneration and helps regulate inflammatory responses.
  8. 08Squalene is also naturally present in olive oil and exhibits moisturizing and antioxidant properties.
  9. 09The polyphenols in olive oil also show anti-aging promise; one clinical study found a measurable improvement in skin appearance after 30 days of topical serum use.
  10. 10Just be aware that applying olive oil directly to skin can weaken the barrier and cause redness. One study with volunteers found even people without sensitive skin experienced a significant reduction in stratum corneum integrity and induced mild erythema.
  11. 11It's best to use this ingredient as part of a carefully crafted formula (instead of putting it on skin directly from the bottle).
  12. 12Because it has a 2-3 on the comedogenic scale, it is a moderate risk for acne-prone skin. However, the overall formulation of a product matters more than a few ingredients with comedogenic ratings.
  13. 13This ingredient may not be fungal acne safe because of the oleic and palmitic acid content. These fall within the C11-24 fatty acid range that the Malassezia yeast can metabolize to grow.
  14. 14Overall, olive oil is a well-studied and nourishing skincare ingredient.
  15. 15Tocopherol is a fat-soluble antioxidant known as Vitamin E.
  16. 16You'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 damag…
  17. 17Topically applied tocopherol has been shown to protect against UV damage by ramping up the skin's own natural defense enzymes.
  18. 18It 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.
  19. 19This 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.
  20. 20This 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.
Source · skinsort.com
02

Product index

Related product references

03

Comparison edit

Read side by side