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[NUMBUZIN] No.5 Goodbye Blemish Serum (50ml)
This daily anti-acne serum is formulated with 75% Vitamin Extract, Ascorbic Acid, and Panthenol to brighten the complexion and fade acne scars or dark spots. Its lightweight, gel-like texture is designed to hydrate the skin while minimizing irritation, making it suitable for all skin types, especially those prone to blemishes.
About the Brand
NUMBUZIN is a Korean skincare brand founded in 2019 that simplifies the beauty experience by categorizing products with a unique, intuitive numbering system. Their philosophy, "What's Your Number?," focuses on problem-first skincare, where each number corresponds to a specific skin concern—such as No. 1 for soothing, No. 3 for texture and glow, and No. 5 for brightening—rather than just trending ingredients. This approach allows consumers to easily identify and select targeted solutions for their individual needs, from acne and hyperpigmentation to elasticity and dryness. The brand is known for its honest, effective formulations that combine premium natural ingredients with advanced technology to deliver visible results. NUMBUZIN has quickly risen in popularity, particularly on social media and in major Korean retailers like Olive Young, for its transparency and consumer-first mindset. By removing the confusion of complex product names, they have made building a personalized, effective skincare routine accessible to a wide audience.
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.