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Bare Seoul
Claire Doyle
Ingredients, actives and the evidence behind them

Claire Doyle

Claire writes the ingredients side of Bare Seoul — what is in the bottle, what the research behind it actually measured, and how often the answer is less than the label suggests. She is not a chemist and reading papers does not make her one.

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Skin goals

What Korean skincare can do for blackheads and clogged pores

Korean routines handle blackheads with gentle steps: an oil cleanse each night, a mild wash, then a low-strength acid a few nights a week. Here's what a blackhead is, and why scrubbing and squeezing don't help.

Ingredients

Korean retinol vs retinal: the difference, and which to choose

Korean brands sell more retinal — retinaldehyde — than almost anyone, often at beginner doses in calm, fragrance-free bases. This guide covers how retinol and retinal differ, which is stronger, and which to start with.

Ingredients

Niacinamide: the quiet all-rounder in your Korean routine

Niacinamide turns up in Korean toners, essences and exfoliants as a supporting player, a few lines down the ingredient list. Here's what this form of vitamin B3 does for skin, and the actives it sits happily beside.

Ingredients

What Korean snail mucin does, and how to use it in a routine

Snail secretion filtrate is the ingredient Korean brands like COSRX turned into a staple. Here's what it does for skin, what the evidence behind it supports, and how to layer it so dry skin holds the extra hydration.

Skin goals

Korean skincare for dark spots and hyperpigmentation

Korea treats an even, luminous tone as the point of a routine, and builds it with gentle brighteners you can use every day. Here's what fades dark spots, and why sun protection does most of the work.

Skin goals

Korean glass skin: what it is, and how to get closer to it

Glass skin — yuri pibu in Korean — is the name for a smooth, lit-from-within complexion. This is what moves the look, what's fixed by genetics and light, and the hydration doing most of the work.

Ingredients

AHA, BHA and PHA: how to choose a Korean exfoliating acid

Korean skincare treats exfoliating acids as a gentle habit — AHA, BHA and PHA, each with a different job. How the three families differ, and which one your skin will get on with.

Ingredients

What Korean heartleaf does for your skin

Heartleaf — Houttuynia cordata — is the herb Korean brands like Anua built a sensitive-skin range around. This is what the research supports, how it differs from centella, and when it's worth reaching for.

The treatment step

Korean essence vs serum: what each does, and do you need both?

Essence and serum sit on the same treatment step, at different strengths. Here's what each does, whether you need both, and how to choose the one Korean active that suits your skin.

Calming vs barrier hydration

Anua Heartleaf 77 Soothing Toner vs Round Lab 1025 Dokdo Toner

Two of the most-recommended gentle Korean toners — both fragrance-free and alcohol-free, but one is built to calm redness and the other is a short, low-irritation formula that hydrates and lightly smooths.

Single BHA vs three acids

COSRX Niacinamide 2% + BHA 4% Blackhead Exfoliant vs Some By Mi AHA-BHA-PHA 30 Days Miracle Toner

One is a single oil-soluble BHA that works inside a clogged pore. The other is three acids at low strength for light daily upkeep across the whole face.

Hydration vs brightening

COSRX Snail 96 Essence vs Beauty of Joseon Glow Deep Serum

Two of the most-recommended affordable Korean serums, and they don't do the same job: one is near-pure snail mucin for hydration, the other pairs rice with alpha-arbutin to even out tone.