NARINFLA Journal (English)

Sunscreen literacy BLOG NOTE · EN 07 Korean Sunscreen vs US Labels: UV Filters, SPF and PA Read the protection claim and the current rule, not the country stereotype. D By Dajeong Park · NARINFLA founder Published October 7, 2026 Evidence reviewed 2026-10-07 Illustrative sunscreen application. The amount shown is not a measured recommended dose. CONTENTS 01 Why do Korean and American sunscreen labels look different? 02 Does SPF50+ mean more time in the sun than SPF 50? 03 Is PA++++ the same as American Broad Spectrum? 04 Is bemotrizinol still only a proposed US sunscreen ingredient? 05 Does an allowed UV filter prove that the finished sunscreen is effective? 06 How should you compare daily sunscreen with a water-resistant product? 07 What should an American shopper verify before buying Korean sunscreen? FAQ Frequently asked questions In this article Why do Korean and American sunscreen labels look different? Does SPF50+ mean more time in the sun than SPF 50? Is PA++++ the same as Ame...

Ingredient comparisons BLOG NOTE · EN 06 Tranexamic Acid vs Niacinamide for Dark Spots Different pathways, overlapping formulas, and no universal winner. D By Dajeong Park · NARINFLA founder Published October 7, 2026 Evidence reviewed 2026-10-07 Illustrative skincare scene, not a diagnosis or before-and-after result. CONTENTS 01 How are tranexamic acid and niacinamide different? 02 What does human research tell us about niacinamide? 03 Is topical tranexamic acid better for dark spots? 04 Can topical results justify taking tranexamic acid pills? 05 Does a Korean brightening label prove tranexamic acid is the functional ingredient? 06 How can you choose without chasing the strongest percentage? 07 Why does sun protection still matter when using a pigment serum? FAQ Frequently asked questions In this article How are tranexamic acid and niacinamide different? What does human research tell us about niacinamide? Is topical tranexamic acid better for dark spots? Can topical results justify ...

Ingredient evidence BLOG NOTE · EN 05 Adenosine in Korean Skincare: Reading Wrinkle Claims The ingredient, the Korean claim, and the evidence are three different things. D By Dajeong Park · NARINFLA founder Published October 7, 2026 Evidence reviewed 2026-10-07 Illustrative texture scene. Appearance alone does not identify adenosine or its concentration. CONTENTS 01 What is adenosine doing in a wrinkle-care formula? 02 Does Korean recognition mean every adenosine product is approved? 03 Can the percentage tell you whether a wrinkle claim is valid? 04 What do human wrinkle studies actually show? 05 How should you compare a modest claim with an inflated one? 06 What should you check before buying an imported bottle? 07 What is a reasonable expectation from adenosine skincare? FAQ Frequently asked questions In this article What is adenosine doing in a wrinkle-care formula? Does Korean recognition mean every adenosine product is approved? Can the percentage tell you whether a wrinkle cla...