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Korean skincare, explained in plain English

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Seoul Skin Diary logo
Seoul Skin Diary
Korean skincare, explained in plain English
  • The Ordinary Azelaic Acid Suspension 10%: An Honest Four-Week Review

    The Ordinary Azelaic Acid Suspension 10%: An Honest Four-Week Review

    October 16, 2026October 16, 2026 Product Reviews

    This article is general information, not medical advice. Persistent or severe acne and rosacea are…

  • COSRX The 6 Peptide Skin Booster pump bottle with a small flat ink character applying serum.

    COSRX The 6 Peptide Skin Booster Review: A Gentle First Step, Not a Miracle

    September 28, 2026October 9, 2026 Product Reviews

    I used COSRX The 6 Peptide Skin Booster as the first step in my routine. Here is what the six peptides are for, how it felt on my skin, what the research supports, and who should skip it.

  • Heimish All Clean Balm jar with a spatula and small flat ink character.

    Heimish All Clean Balm Review: A Reality Check for Acne-Prone Skin

    September 22, 2026October 10, 2026 Product Reviews

    Alongside Banila Co’s Clean It Zero, Heimish’s All Clean Balm is one of the other…

  • Some By Mi AHA BHA PHA toner with cotton pads, a calendar and an ingredient checklist.

    Some By Mi AHA-BHA-PHA 30 Days Miracle Toner Review: What a 35-Day Trial Showed

    September 19, 2026October 17, 2026 Product Reviews

    Few Korean toners generated as much viral before-and-after content as Some By Mi’s AHA-BHA-PHA 30…

  • Purito Centella Green Level Buffet Serum pump bottle, a gel swatch and an ingredient card beside a person applying skincare.

    Purito Centella Green Level Buffet Serum Review: What Real Testers Found

    September 16, 2026October 17, 2026 Product Reviews

    Purito built its brand around gentle, simply formulated products that avoid unnecessary additives. The Centella…

  • Round Lab Birch Juice toner bottle beside a small person patting toner onto their cheek.

    Round Lab Birch Juice Moisturizing Toner Review: What Real Users Found

    September 13, 2026October 18, 2026 Product Reviews

    Round Lab built its brand around a specific storytelling angle: skincare inspired by the natural…

  • Anua Heartleaf 77 toner with heartleaf leaves, cotton pads and a small flat ink character.

    Anua Heartleaf 77% Soothing Toner Review: What a One-Month Trial Showed

    September 11, 2026October 15, 2026 Product Reviews

    Few Korean toners have generated as much sustained buzz over the past few years as…

  • Torriden Dive-In serum bottle with a small hand-drawn character applying serum

    Torriden Dive-In Low Molecule Hyaluronic Acid Serum Review: What Long-Term Users Found

    September 10, 2026October 10, 2026 Product Reviews

    Torriden’s Dive-In serum is the best-known product from a brand that centers its line on…

  • Illustrated sunscreen tubes labeled SPF and PA beside a finish swatch card and a bright sun

    Best Korean Sunscreens for 2026: Whitecast, Finish and PA Ratings Compared

    September 6, 2026October 17, 2026 Product Reviews

    Korean sunscreens built their international reputation on solving a problem Western sunscreens have struggled with…

  • COSRX Advanced Snail 96 essence bottle with a stylized snail and flowing gel.

    COSRX Advanced Snail 96 Mucin Power Essence Review (After 2 Months of Use)

    September 5, 2026October 15, 2026 Product Reviews

    Few products are as closely tied to the international rise of K-beauty as this one….

Categories

  • Comparisons & Guides
  • Ingredients 101
  • K-Beauty Routines
  • Product Reviews
  • Trends & Culture

Recent Posts

  • The Azelaic Acid pH Controversy: What It Actually Proves (And What It Does Not)
  • The Ordinary Azelaic Acid Suspension 10%: An Honest Four-Week Review
  • How Many Actives Is Too Many? A Simple Rule for Layering
  • Seeing a GP After Glycolic Acid Barrier Damage (My Barrier Recovery Diary, Part 2)
  • Niacinamide or Vitamin C: Which Should You Start With for Uneven Tone?

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