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[THE LAB BY BLANC DOUX] Oligo Hyaluronic Acid Boosting Ampoule Refill (33ml)
A highly concentrated ampoule refill containing low molecular weight hyaluronic acid and a boosting complex. It is designed to provide intense, long-lasting hydration to the deeper layers of the skin.
About the Brand
THE LAB BY BLANC DOUX is a Korean skincare brand that emphasizes a minimalist, science-backed approach to achieving fundamental skin health. The brand is best known for its focus on deep hydration, particularly through its signature Oligo Hyaluronic Acid line, which utilizes low-molecular-weight hyaluronic acid to penetrate deeper layers of the skin. Their philosophy centers on purity and performance, prioritizing effective, dermatologist-tested formulas that are free from common irritants like fragrances and essential oils. This makes the brand an excellent choice for individuals with sensitive, dehydrated, or stressed skin. Positioned as an accessible, clean beauty brand, it offers high-quality, research-driven products at fair prices. The brand has gained recognition for its cult-favorite toners and serums, which are frequently praised for their ability to deliver intense, lasting moisture without causing irritation.
Full active list and clinical composition.
This list of ingredients represents all options or variants of this product. Actual ingredients in a given product option may vary from this list. Ingredients subject to change at manufacturer's discretion.
For the most complete and up-to-date list of ingredients, please refer to product packaging.
Korean beauty products are labelled in Korean.
For reference: 제조 Manufacture · 까지 Until · 만료 Expiry
Patch test recommended before first use. For full product information, see our Disclaimer.
Step 5 — Treat
Targets specific skin concerns with high-concentration actives.
Apply 2–3 drops, press into skin, do not rub.
Layer from lightest to heaviest texture.
Patch test recommended before first use. For full product information, see our Disclaimer.
Every KCOS order is hand-picked and shipped from Seoul. Flat rate $9.80 worldwide. Free over $80.
1–3 business days from Seoul, South Korea. Tracking provided by email once dispatched.
5–8 business days worldwide. Allow extra days during 11.11, Black Friday and Lunar New Year.
Import VAT and customs fees may apply on arrival, set by your local authorities. We'll always do our best to help if anything unexpected comes up — write to hello@kcosonline.com.
Every product is sourced directly in Seoul by our team. We don't work with third-party warehouses or unverified resellers.
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Due to the nature of cosmetics shipped internationally, we accept returns only for damaged or defective items. Reach out within 14 days of delivery at hello@kcosonline.com.