Serum
Facial Treatment
Korean South Korea
Korean South Korea

What's inside

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

Show highlights for:

Water

Skin Conditioning

Methylpropanediol

Solvent

Glycerin

Humectant
0 / 0 Helps hydrate Dry Skin IconGood for Scar Healing IconGood for Barrier Repair Icon

Niacinamide

Smoothing
Niacinamide IconHelps fight Acne IconHelps with Anti-Aging IconHelps brighten skin IconHelps reduce irritation IconGood for Oily Skin IconGood for Minimizing Pores IconHelps reduce Skin Redness IconGood for Scar Healing IconGood for Dark Spots IconGood for Skin Texture IconGood for Barrier Repair Icon

Erythritol

Humectant
Helps hydrate Dry Skin Icon

1,2-Hexanediol

Skin Conditioning
Helps hydrate Dry Skin Icon

Dipropylene Glycol

Humectant

Polyglycerin-3

Humectant
Helps hydrate Dry Skin Icon

Ammonium Acryloyldimethyltaurate/Vp Copolymer

Xylitol

Humectant
Helps hydrate Dry Skin IconGood for Barrier Repair Icon

Caprylic/Capric Triglyceride

Masking
Coconut Derived IconHelps hydrate Dry Skin IconGood for Barrier Repair Icon

Hydrogenated Lecithin

Emulsifying
Helps hydrate Dry Skin IconGood for Barrier Repair Icon

Butylene Glycol

Humectant
1 / 0 Helps hydrate Dry Skin IconGood for Barrier Repair Icon

Glycolipids

Skin Conditioning

Carbomer

Emulsion Stabilising
1 / 0

Panthenol

Skin Conditioning
0 / 0 Helps hydrate Dry Skin IconHelps reduce irritation IconHelps reduce Skin Redness IconGood for Scar Healing IconGood for Barrier Repair Icon

Diphenyl Dimethicone

Emollient
Silicon Icon

Triethylhexanoin

Masking

Tromethamine

Buffering

Ethylhexylglycerin

Skin Conditioning

Dipotassium Glycyrrhizate

Humectant
Helps reduce irritation IconHelps reduce Skin Redness Icon

Bifida Ferment Lysate

Skin Conditioning
Helps hydrate Dry Skin IconHelps reduce irritation IconHelps reduce Skin Redness IconGood for Barrier Repair Icon

Adenosine

Skin Conditioning
Helps with Anti-Aging IconHelps hydrate Dry Skin IconHelps reduce irritation Icon

Melia Azadirachta Flower Extract

Skin Conditioning

Phaseolus Angularis Seed Extract

Antioxidant
Antioxidant Icon

Xanthan Gum

Emulsifying

Ocimum Sanctum Leaf Extract

Skin Conditioning

Rosmarinus Officinalis Leaf Oil

Masking
Oil IconEssential Oil IconMay worsen Perioral Dermatitis IconMay worsen Psoriasis Icon

Macadamia Ternifolia Seed Oil

Emollient
Oil IconHelps hydrate Dry Skin IconMay worsen Seborrheic Dermatitis IconNot safe for Fungal Acne Icon

Allantoin

Skin Conditioning
0 / 0 Helps hydrate Dry Skin IconHelps reduce irritation IconHelps reduce Skin Redness IconGood for Scar Healing IconGood for Barrier Repair Icon

Dextrin

Absorbent

Melia Azadirachta Leaf Extract

Skin Conditioning

Sodium Hyaluronate

Humectant
0 / 0 Hyaluronic Acid IconHelps with Anti-Aging IconHelps hydrate Dry Skin IconHelps reduce Skin Redness IconGood for Barrier Repair Icon

Theobroma Cacao Extract

Skin Conditioning

Retinol

Skin Conditioning
Retinoid IconHelps fight Acne IconHelps with Anti-Aging IconHelps brighten skin IconGood for Oily Skin IconGood for Minimizing Pores IconGood for Scar Healing IconGood for Dark Spots IconGood for Skin Texture IconMay worsen Perioral Dermatitis IconMay worsen Psoriasis IconMay worsen Rosacea Icon

Triethyl Citrate

Masking
Fragrance Icon

Limonene

Perfuming
Fragrance IconMay worsen Eczema IconMay cause irritation IconMay worsen Perioral Dermatitis IconMay worsen Psoriasis IconMay worsen Rosacea IconEU Allergen Icon

Curcuma Longa Root Extract

Masking
Fragrance Icon

Cyanocobalamin

Skin Conditioning

Sodium Phytate

Corallina Officinalis Extract

Skin Conditioning
Helps hydrate Dry Skin IconHelps reduce Skin Redness Icon

Brassica Campestris Sterols

Emollient

Cholesterol

Emollient
0 / 0 Helps hydrate Dry Skin IconGood for Barrier Repair Icon

Polyglyceryl-10 Laurate

Skin Conditioning
May worsen Seborrheic Dermatitis IconNot safe for Fungal Acne Icon

Palmitoyl Tripeptide-5

Skin Conditioning
Peptide IconHelps with Anti-Aging IconGood for Skin Texture Icon

Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate

Skin Conditioning

Tocopheryl Acetate

Antioxidant
0 / 0 Vitamin E IconAntioxidant IconHelps brighten skin Icon

Aluminum/Magnesium Hydroxide Stearate

Emulsion Stabilising

Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate

Antioxidant
Antioxidant Icon

P-Anisic Acid

Masking
Fragrance Icon

Potassium Cetyl Phosphate

Emulsifying

Citrus Aurantium Dulcis Peel Oil

Masking
Oil IconEssential Oil IconMay worsen Perioral Dermatitis IconMay worsen Psoriasis IconEU Allergen Icon

Diethylhexyl Syringylidenemalonate

Skin Protecting

Tris(Tetramethylhydroxypiperidinol)Citrate

Stabilising

Pentylene Glycol

Skin Conditioning
Good for Barrier Repair Icon

Tocopherol

Antioxidant
0-3 / 0-3 Vitamin E IconAntioxidant IconHelps with Anti-Aging IconHelps hydrate Dry Skin IconHelps brighten skin IconHelps reduce Skin Redness IconGood for Dark Spots IconGood for Barrier Repair Icon

Capryloyl Salicylic Acid

Exfoliating
Exfoliant IconHelps fight Acne IconGood for Oily Skin IconGood for Minimizing Pores IconGood for Dark Spots Icon

Caprylyl/Capryl Glucoside

Cleansing

Ceramide NP

Skin Conditioning
Ceramide IconHelps with Anti-Aging IconHelps hydrate Dry Skin IconHelps reduce irritation IconHelps reduce Skin Redness IconGood for Barrier Repair Icon

Glycine Soja Oil

Emollient
3 / 0 Oil IconHelps hydrate Dry Skin IconHelps reduce irritation IconGood for Dark Spots IconBad for Acne Prone Skin IconMay worsen Seborrheic Dermatitis IconMay worsen Keratosis Pilaris IconMay worsen Oily Skin IconNot safe for Fungal Acne Icon

Water

Skin Conditioning

Caprylic/Capric Triglyceride

Masking
Coconut Derived IconHelps hydrate Dry Skin IconGood for Barrier Repair Icon

Butylene Glycol

Humectant
1 / 0 Helps hydrate Dry Skin IconGood for Barrier Repair Icon

Tocopherol

Antioxidant
0-3 / 0-3 Vitamin E IconAntioxidant IconHelps with Anti-Aging IconHelps hydrate Dry Skin IconHelps brighten skin IconHelps reduce Skin Redness IconGood for Dark Spots IconGood for Barrier Repair Icon

Tocopheryl Acetate

Antioxidant
0 / 0 Vitamin E IconAntioxidant IconHelps brighten skin Icon

Methyl Trimethicone

Skin Conditioning
Silicon Icon

Trehalose

Humectant
Helps with Anti-Aging IconHelps hydrate Dry Skin IconGood for Barrier Repair Icon

Panthenol

Skin Conditioning
0 / 0 Helps hydrate Dry Skin IconHelps reduce irritation IconHelps reduce Skin Redness IconGood for Scar Healing IconGood for Barrier Repair Icon

Butyrospermum Parkii Butter

Skin Conditioning
Helps hydrate Dry Skin IconGood for Barrier Repair IconBad for Acne Prone Skin IconMay worsen Seborrheic Dermatitis IconMay worsen Keratosis Pilaris IconMay worsen Oily Skin IconNot safe for Fungal Acne Icon

Cetearyl Alcohol

Emollient
2 / 1 Fatty Alcohol IconCoconut Derived IconBad for Acne Prone Skin IconMay worsen Seborrheic Dermatitis IconMay worsen Keratosis Pilaris IconMay worsen Oily Skin IconNot safe for Fungal Acne Icon

Polyglyceryl-10 Stearate

Skin Conditioning
May worsen Seborrheic Dermatitis IconNot safe for Fungal Acne Icon

Ammonium Acryloyldimethyltaurate/Beheneth-25 Methacrylate Crosspolymer

Emulsion Stabilising

Hydrogenated Lecithin

Emulsifying
Helps hydrate Dry Skin IconGood for Barrier Repair Icon

Glycine Soja Oil

Emollient
3 / 0 Oil IconHelps hydrate Dry Skin IconHelps reduce irritation IconGood for Dark Spots IconBad for Acne Prone Skin IconMay worsen Seborrheic Dermatitis IconMay worsen Keratosis Pilaris IconMay worsen Oily Skin IconNot safe for Fungal Acne Icon

Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer

Emulsion Stabilising

Parfum

Masking
Synthetic Fragrance IconFragrance IconMay worsen Eczema IconMay worsen Perioral Dermatitis IconMay worsen Psoriasis IconMay worsen Seborrheic Dermatitis IconMay worsen Keratosis Pilaris IconMay worsen Rosacea Icon

Carbomer

Emulsion Stabilising
1 / 0

Tromethamine

Buffering

Glyceryl Stearate

Emollient
1 / 0 May worsen Seborrheic Dermatitis IconNot safe for Fungal Acne Icon

Sodium Sulfite

Preservative
Preservative Icon

Allantoin

Skin Conditioning
0 / 0 Helps hydrate Dry Skin IconHelps reduce irritation IconHelps reduce Skin Redness IconGood for Scar Healing IconGood for Barrier Repair Icon

Glyceryl Caprylate

Emollient

Gardenia Florida Fruit Extract

Skin Conditioning

Stearic Acid

Cleansing
2-3 / 0 Helps hydrate Dry Skin IconMay worsen Seborrheic Dermatitis IconMay worsen Oily Skin IconNot safe for Fungal Acne Icon

Polyglyceryl-3 Methylglucose Distearate

Emulsifying
May worsen Seborrheic Dermatitis IconNot safe for Fungal Acne Icon

Palmitic Acid

Emollient
2 / 0 Helps hydrate Dry Skin IconMay worsen Seborrheic Dermatitis IconMay worsen Oily Skin IconNot safe for Fungal Acne Icon

Disodium EDTA

Ethylhexylglycerin

Skin Conditioning

Retinol

Skin Conditioning
Retinoid IconHelps fight Acne IconHelps with Anti-Aging IconHelps brighten skin IconGood for Oily Skin IconGood for Minimizing Pores IconGood for Scar Healing IconGood for Dark Spots IconGood for Skin Texture IconMay worsen Perioral Dermatitis IconMay worsen Psoriasis IconMay worsen Rosacea Icon

Dextrin

Absorbent

Sorbitan Isostearate

Emulsifying
1-2 / 0 May worsen Seborrheic Dermatitis IconNot safe for Fungal Acne Icon

Ceramide AP

Skin Conditioning
Ceramide IconHelps with Anti-Aging IconHelps hydrate Dry Skin IconHelps reduce irritation IconHelps reduce Skin Redness IconGood for Barrier Repair Icon

1,2-Hexanediol

Skin Conditioning
Helps hydrate Dry Skin Icon

Madecassoside

Antioxidant
Antioxidant IconHelps with Anti-Aging IconHelps reduce irritation IconHelps reduce Skin Redness IconGood for Scar Healing IconGood for Skin Texture IconGood for Barrier Repair Icon

Tranexamic Acid

Astringent
Tranexamic Acid IconHelps brighten skin IconHelps reduce irritation IconHelps reduce Skin Redness IconGood for Dark Spots Icon

Hedychium Coronarium Root Extract

Masking

BHT

Antioxidant
Antioxidant Icon

Myristic Acid

Cleansing
3 / 0 Helps hydrate Dry Skin IconBad for Acne Prone Skin IconMay worsen Seborrheic Dermatitis IconMay worsen Keratosis Pilaris IconNot safe for Fungal Acne Icon

Lauric Acid

Cleansing
4 / 1 Bad for Acne Prone Skin IconMay worsen Seborrheic Dermatitis IconMay worsen Keratosis Pilaris IconMay worsen Oily Skin IconNot safe for Fungal Acne Icon

Ascorbic Acid

Antioxidant
Vitamin C IconAntioxidant IconHelps with Anti-Aging IconHelps brighten skin IconGood for Scar Healing IconGood for Dark Spots IconGood for Skin Texture Icon

Limnanthes Alba Seed Oil

Skin Conditioning
Oil IconHelps hydrate Dry Skin IconMay worsen Seborrheic Dermatitis IconNot safe for Fungal Acne Icon

Caprylyl Glycol

Emollient
Fatty Alcohol Icon

3-O-Ethyl Ascorbic Acid

Skin Conditioning
Vitamin C IconHelps brighten skin IconGood for Minimizing Pores IconHelps reduce Skin Redness IconGood for Scar Healing IconGood for Skin Texture Icon

Propanediol

Solvent
Helps hydrate Dry Skin IconGood for Barrier Repair Icon

Glutathione

Helps brighten skin IconHelps reduce Skin Redness IconGood for Dark Spots Icon

Acetyl Heptapeptide-4

Humectant
Peptide IconHelps with Anti-Aging IconGood for Dark Spots Icon

Sodium Hyaluronate

Humectant
0 / 0 Hyaluronic Acid IconHelps with Anti-Aging IconHelps hydrate Dry Skin IconHelps reduce Skin Redness IconGood for Barrier Repair Icon

Hydrolyzed Hyaluronic Acid

Humectant
Hyaluronic Acid IconHelps with Anti-Aging IconHelps hydrate Dry Skin IconGood for Scar Healing Icon

Acetyl Hexapeptide-8

Humectant
Peptide IconHelps with Anti-Aging Icon

Sodium Hydroxide

Buffering

Sodium Hyaluronate Crosspolymer

Humectant
Hyaluronic Acid IconHelps hydrate Dry Skin IconGood for Scar Healing Icon

Hyaluronic Acid

Humectant
Hyaluronic Acid IconHelps with Anti-Aging IconHelps hydrate Dry Skin IconGood for Scar Healing IconGood for Barrier Repair Icon

Sodium Acetylated Hyaluronate

Humectant
Hyaluronic Acid IconHelps with Anti-Aging Icon

Acetyl Octapeptide-3

Humectant
Peptide IconHelps with Anti-Aging Icon

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Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

Skin Conditioning, Solvent

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 
Skin Conditioning, Skin Protecting, Soothing

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 Allantoin
Humectant, Masking, Skin Conditioning

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.

Learn more about Butylene Glycol
Masking, Skin Conditioning

Caprylic/Capric Triglyceride (aka MCT Oil) is a lightweight emollient, solvent, and texture enhancer. It is considered a skin-softener by helping to prevent moisture loss.

Though it behaves like an oil, it is not technically one due to its chemical composition. One perk of this ingredient is that it is very stable, resistant to oxidation, and unlikely to go rancid.

In practice, that translates to a long shelf life and a consistently elegant skin feel.

While there is an assumption Caprylic Triglyceride can clog pores due to it being derived from coconut oil, there is no research supporting this. Just patch test if you have concerns.

Fractionated coconut oil and MCT Oil are both listed as Caprylic/Capric Triglyceride according to INCI. This is because INCI names are based on the ingredient’s final chemical composition and not its marketing name or source.

This ingredient is treated as the gold standard fungal acne safe oil. Even though it is coconut derived, the problematic lauric acid is stripped out.

This leaves just caprylic (C8) and capric (C10) acid. These chain lengths actually trend antifungal; a 2020 study found caprylic acid was enough to disrupt Malassezia furfur cell membrane, with a caprylic acid derivative damaging membrane structures at concentrations as low as 0.2%.

Learn more about Caprylic/Capric Triglyceride
Emulsion Stabilising, Gel Forming

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.

Learn more about Carbomer
Absorbent

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).

Learn more about Dextrin
Skin Conditioning

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 Ethylhexylglycerin
Emollient, Skin Conditioning

Glycine Soja Oil is a plant-derived oil from soybean seeds. Like other oils, it is rich in essential fatty acids (mostly linoleic and oleic) that support skin hydration and barrier function.

The fatty acids are able to integrate into the lipid matrix of the stratum corneum to help soften skin and reduce water loss.

On top of that, soybean oil is rich in vitamins like vitamin E, a potent antioxidant.

Research on soybean's active components also point to anti-inflammatory, collagen-stimulating, antioxidant activity, and protection against UV-induced oxidative damage.

Most of this research applies to the broader soybean plant and not just the oil fraction alone.

This ingredient may not be fungal acne safe due to the oleic acid content.

Learn more about Glycine Soja Oil
Emulsifying, Skin Conditioning

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).

Learn more about Hydrogenated Lecithin
Skin Conditioning

Panthenol is a common ingredient that helps hydrate and soothe the skin. It is found naturally in our skin and hair.

There are two forms of panthenol: D and L.

D-panthenol is also known as dexpanthenol. Most cosmetics use dexpanthenol or a mixture of D and L-panthenol.

Panthenol is famous due to its ability to go deeper into the skin's layers. Using this ingredient has numerous pros (and no cons):

Like hyaluronic acid, panthenol is a humectant. Humectants are able to bind and hold large amounts of water to keep skin hydrated.

This ingredient works well for wound healing. It works by increasing tissue in the wound and helps close open wounds.

Once oxidized, panthenol converts to pantothenic acid. Panthothenic acid is found in all living cells.

This ingredient is also referred to as pro-vitamin B5.

Learn more about Panthenol
Skin Conditioning

Retinol is one of the most studied anti-aging ingredients in skincare (and for good reason!).

It's a form of vitamin A that your skin converts into Retinoic Acid, the active molecule that actually does the work in your cells.

That conversion happens in two steps: your skin first turns Retinol into Retinaldehyde (also called Retinal), then turns Retinaldehyde into Retinoic Acid.

Retinol is converted to biologically active retinoic acid via retinaldehyde by dehydrogenases in a two-step oxidation process.

Each step is a little "upgrade" toward the active form which is part of why Retinol is gentler than prescription Retinoic Acid; your skin does the work gradually. This also explains where Retinol sits in the retinoid family.

Here is the retinoid family ranked roughly by strength: Retinyl Esters (like Retinyl Palmitate) < Retinol < Retinaldehyde < Retinoic Acid.

Retinoid activity increases in that order, while tolerance runs in reverse; retinyl esters are the gentlest and retinoic acid the most irritating.

The more conversion steps an ingredient needs, the gentler (and slower) it tends to be, so Retinol lands in a nice middle spot. It's more effective than the esters, gentler than prescription options.

Once it becomes Retinoic Acid, it binds to receptors inside your cells' nuclei (called RARs and RXRs). These receptor pairs bind to specific DNA motifs called retinoic acid response elements and act like switches that turn certain genes on or off.

In practice, this means a few things happen in a formula. It:

That last two are worth a closer look.

A study that tested Retinol directly (not just prescription Retinoic Acid) found that four weeks of retinol thickened the epidermis and switched on the genes for Collagen I and Collagen III, with more procollagen I and III showing up in the skin. And after twelve weeks, facial wrinkles were visibly reduced.

Retinoids more broadly stimulate the skin's synthesis of hyaluronan and other glycosaminoglycans, part of what gives skin a plumper, more hydrated look over time.

So even the gentler OTC form is doing real structural work (not just sitting on the surface).

It's also worth knowing Retinol isn't only a wrinkle ingredient; it can help with uneven tone, dark spots, rough texture, and the look of pores as well because it speeds up turnover and influences pigment.

The research backs this up as well.

A pooled analysis of six clinical studies found that 0.1% stabilized retinol improved all signs of photoaging versus vehicle as early as week 4 and through 12 weeks, with only a few mild cases of irritation.

Another study comparing concentrations found that 0.3% and 1% Retinol were similarly effective at remodeling photodamaged skin, but 0.3% caused fewer adverse reactions when used daily (a useful reminder that more isn't always better).

Retinol is about tenfold less potent than Retinoic Acid. This is why it works as a gentler, non-prescription option that builds results over time.

Typical concentrations range from 0.1-1%, with 0.1% to 0.3% being a well-supported sweet spot for visible benefits with good tolerability.

One quirk worth mentioning: Retinol is famously unstable.

It's highly sensitive to light and oxygen, and UV exposure breaks it down into a range of degradation products.

Real-world testing bears this out, with retinoid content in some products dropping anywhere from 0% to 80% after six months at room temperature, and even more at higher temperatures.

This is why good formulations lean on opaque, air-tight packaging (think tubes and pumps, not clear jars) and often "encapsulate" the Retinol to shield it.

Signs of oxidation include your product turning yellow or smelling "off". Keeping it somewhere cool and dark, and using it up within a few months of opening helps it stay effective.

The most common side effects are mild and temporary: usually some dryness, redness, or light peeling as your skin adjusts. These tend to settle with consistent and lower-frequency use.

Like all retinoids, Retinol works best with nightly use, a good moisturizer, and daytime sunscreen.

The "ramp up" method works well: start with Retinol once a week to give your skin time to adjust, which keeps irritation low. Slowly add more nights until you reach your goal frequency once your skin feels comfortable.

Retinoids also make your skin more sensitive to the sun in the first few weeks, so wear sunscreen every morning and protect your skin from direct sun while you build up tolerance.

One safety note: topical Retinoids aren't recommended during pregnancy or breastfeeding. Systemic absorption from creams is low but because high oral vitamin A is a known teratogen and topical safety data are limited, most clinicians recommend stopping retinoids when pregnant or trying to conceive.

Learn more about Retinol
Humectant, Skin Conditioning

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.

Learn more about Sodium Hyaluronate
Antioxidant, Masking, Skin Conditioning

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.

Learn more about Tocopherol
Antioxidant, Skin Conditioning

Tocopheryl Acetate is a stable, shelf-friendly form of vitamin E.

Formulators love it because plain vitamin E oxidizes quickly once it hits air. This acetate version stays stable and resists going off, helping to extend a product's shelf life.

It's actually inactive on its own and works like a slow-release "storage" form; the enzymes in your skin called esterases gradually convert it into active vitamin E over time.

One in vivo study showed 5% of the acetate in the living layer of the epidermis converted to vitamin E after 5 days of application. This study also found the skin gained protection against UV damage even though the conversion was slow and small.

Once converted, vitamin E acts as a skin's main fat-soluble antioxidant that fights free radicals to protect skin from damage.

Topical vitamin E generally boosts the skin's photoprotection, and it reduced UV-damage in animal models.

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.

Overall, it has a pretty solid safety profile and has been found to be non-irritating and non-comedogenic. Allergic reactions may happen but stay rare due to how widely the ingredient gets used.

The concentration will vary depending on the formula; industry data shows 0.1% in baby lotions, 3% in lipsticks, and 5% in foot powders. You can also find this ingredient at 100% in a pure vitamin E oil.

Most leave-on skincare keeps it at the lower end, often between 0.5-1%.

Learn more about Tocopheryl Acetate
Buffering, Masking

Tromethamine (aka THAM) is a synthetic amino acid that shows up in skincare as a helper ingredient.

It functions as a pH adjuster to help neutralize acidic ingredients and set a formula's pH to the right spot.

This matters a lot because a lot of actives (like vitamin C) needs a specific pH to work well and feel comfortable on skin.

Concentration use ranges from 0.1-1.0% depending on the formula.

Learn more about Tromethamine
Skin Conditioning, Solvent

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!

Learn more about Water

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