K-Secret
K-Secret Seoul 1988 Retinal Serum Duo Set
K-Secret SEOUL 1988 Retinal Serum Duo Set is an advanced anti-aging skincare set designed to improve skin texture, enhance firmness, and reduce the appearance of fine lines and uneven tone. This duo delivers the benefits of retinal in a gentle, skin-friendly formula suitable for regular nighttime use.
Formulated with Retinal (Retinaldehyde), the serum helps accelerate skin renewal, smooth rough texture, and promote a clearer, more youthful-looking complexion. The formula is balanced with hydrating and soothing ingredients to support the skin barrier and minimize irritation commonly associated with vitamin A products.
With a lightweight, fast-absorbing texture, the serum penetrates easily into the skin, leaving it smoother, firmer, and more refined with continued use. The duo set provides extended use and consistent results as part of an effective anti-aging and skin-renewal routine.

Product guidance
Good to know before you order.
Is it right for you?
Check the description and packaging for skin type, key ingredients and how often to use it. Not sure? Ask us before you order.
How to use
Apply as directed on the package. Introduce active formulas gradually, patch test when trying a new product, and use sunscreen during daytime routines.
Ingredients and safety
Ingredient lists can change by batch. Always review the label before use, especially if you are pregnant, nursing, sensitive to fragrance, or using prescription skincare.
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