
Anua
A hydrating serum formulated with 4 growth factors (peptides) and 8 types of hyaluronic acid to support skin barrier repair and intensive moisture retention. Suitable for dehydrated and compromised skin.
Solvent and humectant for ingredient delivery
Humectant that attracts and retains moisture
Humectant and preservative booster. Common in K-beauty as a multifunctional alternative to traditional preservatives.
+ 15 more ingredients
Editorial baseline from K-beauty clinical research and community consensus. Real subscriber reports layer on as the community grows.

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The key active ingredients in 4GF Derma Repair Hydro Serum by Anua include Glycerin (Humectant that attracts and retains moisture), Niacinamide (Vitamin B3) (brightening, pore-minimizing, barrier-support), Lactobacillus Ferment (Probiotic that balances skin microbiome), EGF (Epidermal Growth Factor) (Cell regeneration and skin renewal signaling peptide), Recombinant Human Basic Fibroblast Growth Factor (bFGF) (Cell proliferation and skin regeneration enhancer). Drawing on K-beauty research and community consensus, key ingredients show 82% effectiveness for acne in oily skin types. Seoul Sister tracks ingredient effectiveness across 5,900+ K-beauty products to provide data-backed recommendations.
4GF Derma Repair Hydro Serum is a Korean serum by Anua. Sensitive skin compatibility depends on individual triggers and allergies. Seoul Sister's AI advisor Yuri analyzes all 20 ingredients against your specific skin type, concerns, and known allergens to provide a personalized compatibility score. Common irritant ingredients like fragrance, alcohol denat, and essential oils are flagged automatically.
For oily skin, the key factors in evaluating 4GF Derma Repair Hydro Serum are comedogenic ingredient ratings, oil content, and finish type. This serum contains 13 active ingredients. Seoul Sister's database cross-references each ingredient's comedogenic rating (0-5 scale) against your skin type to identify potential pore-clogging risks. Subscribe for a personalized oily skin compatibility analysis.
4GF Derma Repair Hydro Serum by Anua is sold through authorized retailers and the brand itself. Buy from an authorized retailer or the brand's own site rather than an open marketplace. Olive Young Global ships to most countries but no longer ships to the US. Seoul Sister tracks counterfeit indicators to help you buy genuine Korean skincare. We are an advice platform and never sell products ourselves.
That $11 Korean cleanser outperforming your $38 one is not hiding anything. The low price comes from how the Korean beauty industry is built, not from what is in the bottle. With one geographic catch.
Sulwhasoo First Care Serum is a $90+ luxury product, which makes it one of the most counterfeited items in K-beauty. Here are five verifiable checks (from packaging weight to barcode origin) to confirm your bottle is real before it touches your face.