Ingredients to Avoid in K-Beauty Products: Safety Guide
A guide to commonly questioned cosmetic ingredients, what EWG Skin Deep is, and how to read Korean product labels
Korean cosmetics are regulated by the Ministry of Food and Drug Safety (MFDS). Not every permitted ingredient suits every user. Knowing which ingredients to check helps you choose without relying on marketing words like 'clean' or 'natural', which have no legal definition. This guide lists ingredients that are often questioned and explains how to check a product yourself.
Ingredients people often choose to avoid or limit: parabens (methylparaben, propylparaben, butylparaben); synthetic fragrance ('Parfum' or 'Fragrance'), a single label word that can cover many undisclosed ingredients, including known allergens; formaldehyde-releasing preservatives (DMDM hydantoin, imidazolidinyl urea, quaternium-15); phthalates (DEP, DBP, DEHP); and the UV filters oxybenzone and octinoxate, which some places restrict because of coral reef concerns.
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Korean products list full ingredients, and the INCI (International Nomenclature of Cosmetic Ingredients) names are the same worldwide, which makes checking easy. Apps like Yuka, EWG Healthy Living, or the Korean app Hwahae let you scan a product and see each app's own ingredient ratings. Each app uses its own method, so the same product can look different from one app to the next.
EWG Skin Deep is a public database run by the Environmental Working Group, a US nonprofit. It gives individual ingredients a hazard rating from 1 (lower concern) to 10 (higher concern) and shows how much published data stands behind each rating. These ratings are EWG's own view, not a legal standard, and an ingredient with little data can look safer than it is. beauof does not give products an EWG score or any safety grade. To check a product yourself, take the full INCI list from the brand or retailer and look up the ingredients you care about.
Practical tips: learn the ingredient groups above and scan ingredient lists for them before buying. 'Fragrance-free' and 'unscented' are not the same; unscented products may contain masking fragrance. Read lip product lists with extra care, since small amounts are swallowed. 'Natural' does not mean 'safe': essential oils like lavender, tea tree, and citrus can cause skin reactions in sensitive people. Check again from time to time, since research changes and brands reformulate.
Look up an ingredient on EWG Skin Deep: ewg.org/skindeep