This hydrating serum is formulated around Niacinamide and Camellia Sinensis Leaf Extract to hydrate skin and strengthen the skin barrier.

This calming serum is formulated around Azelaic Acid to calm redness and refine skin texture.

Serum
Serum
Korean South Korea
Canadian Canada

What's inside

What's inside

Key Ingredients

Benefits

Concerns

Ingredients Side-by-side

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Water

Skin Conditioning

Propanediol

Solvent
Helps hydrate Dry Skin IconGood for Barrier Repair Icon

Glycerin

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

Alcohol Denat.

Antimicrobial
Alcohol IconCan worsen Dry Skin IconMay worsen Eczema IconMay cause irritation IconMay worsen Perioral Dermatitis IconMay worsen Psoriasis IconMay worsen Seborrheic Dermatitis IconMay worsen Keratosis Pilaris IconMay worsen Rosacea Icon

1,2-Hexanediol

Skin Conditioning
Helps hydrate Dry Skin 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.

Humectant, Solvent

Ethoxydiglycol (aka Diethylene Glycol Monoethyl Ether) is one of the cosmetic world's quiet problem solvers.

In a formula, it is a solvent that dissolves tricky ingredients that don't want to mix in and helps spread ingredients evenly across your skin without leaving a greasy or sticky feeling

This makes it great for hard-to-dissolve actives like vitamin C, benzoyl peroxide, and self-tanner DHA.

It also has mild humectant and penetration enhancer abilities so it can help some actives absorb a little deeper.

The penetration boost is backed by lab research: studies using human skin samples found it improved how well an active dissolves into the upper layer of skin rather than tearing down your skin barrier. Reviews of its mechanism also describe it interacting gently with the lipids and water in your outermost layer of skin.

Just know this penetration-enhancing effect is not universal. It helps a lot in some formulas and did very little in others (so the benefit really depends on the specific product).

Safety-wise, the evidence is reassuring. The Cosmetic Ingredient Review Expert Panel reviewed it and concluded it's safe for use in cosmetics and recognized it as non-irritating, non-sensitizing, and non-comedogenic in skincare.

Typical leave-on skincare usage lands around 1-10%. The EU has sets caps of 2.6% in non-spray products, 10% in rinse-offs, 7% in oxidative hair dye, and 5% in non-oxidative hair dye.

Learn more about Ethoxydiglycol

This is a synthetic polymer. It helps improve the texture of products by adding thickness and gel-like feel.

It is also an emulsifer, meaning it prevents ingredients such as oil and water from separating. It also helps evenly disperse other ingredients.

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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