Jumiso Niacinamide 20% Serum 40ml

A high-potency brightening serum that targets multiple types of discoloration at once

This is a brightening functional serum formulated with 20% niacinamide. It's designed to address multiple pigmentation concerns in one product, from melasma and dark spots to post-breakout marks and uneven skin tone. Registered with the Korean Ministry of Food and Drug Safety as a brightening functional cosmetic for added efficacy assurance.

Clinical results confirmed after 2 weeks of use

A human application test confirmed the following improvements:

• 25.1% improvement in skin pigmentation (melanin)
• 20.3% improvement in surface-level melasma and dark spots
• 27.7% improvement in deeper melasma and dark spots

In the user satisfaction survey, 100% of participants gave positive responses across all categories, including brighter-looking skin tone, visibly faded melasma and dark spots, and a more refined skin texture.

High-potency yet gentle formula, safe for sensitive skin

Despite the 20% concentration, the formula includes soothing and hydrating ingredients to ensure comfortable use without irritation.

• Tranexamic Acid: targets melasma and dark spots for brightening care
• Glutathione: helps inhibit excess melanin production
• TECA (Asiaticoside, Madecassic Acid, Asiatic Acid): soothes redness and post-breakout marks
• Triple Hyaluronic Acid: delivers layered hydration

Completed skin irritation test, sensitive skin irritation test, and non-comedogenic test. Free from artificial fragrance and artificial colorants, making it suitable for daily use even on acne-prone or sensitive skin. If you're new to niacinamide, we recommend starting with 2 to 3 times per week and gradually increasing to daily use once your skin adjusts.

Use after toner, during your essence or serum step

This is a serum designed to be used after cleansing and toning, during your hydrating essence or ampoule stage. Because it contains a high concentration of 20% niacinamide, it may feel slightly drying when used alone. If that happens, layer one or two drops of a hydrating ampoule first, then apply this serum on top for a more comfortable experience.

Safe for morning and evening use, but start slowly if you're new to niacinamide

You can incorporate this into both your morning and evening routines. However, if you're new to niacinamide, start with 2–3 times per week and monitor how your skin responds. If all goes well, gradually increase to every other day, then daily use once your skin has adjusted.

Apply an appropriate amount and pat gently to absorb

Dispense an appropriate amount using the dropper, spread evenly across your face, and gently pat with your palms to help absorption. For areas where dark spots or hyperpigmentation are a concern, feel free to apply a second layer. You can also use it on body areas prone to pigmentation, such as underarms or elbows.

Pairing suggestions based on your skin concerns

• If dull complexion is your concern: Separate your vitamin C and niacinamide by time of day—use vitamin C in the morning and this serum in the evening
• If post-breakout marks linger: The TECA in this formula helps soothe skin, so layering it right after a calming toner creates a synergistic effect
• If pores and excess oil are both concerns: Focus application on areas that tend to get shiny, like the T-zone or center of the face

High-concentration formula—here's what to keep in mind

This serum has completed non-comedogenic testing, making it suitable for acne-prone skin, but individual reactions may vary depending on your skin's condition. In the beginning, mixing it with a hydrating product is a smart approach. If you notice white powder forming at the bottle opening or the color lightening slightly, don't worry—that's a natural occurrence with high-concentration formulas. Store in a cool place away from direct sunlight, and if you experience redness or itching during use, discontinue and consult a dermatologist.

Water, Niacinamide, Propanediol, Butylene Glycol, Tranexamic Acid, 1,2-Hexanediol, Hydroxyacetophenone, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Glycereth-25 PCA Isostearate, Arginine, Ethylhexylglycerin, Gardenia Jasminoides Fruit Extract, Dextrin, Trisodium Ethylenediamine Disuccinate, Glycerin, Zea Mays (Corn) Kernel Extract, Dipropylene Glycol, Glutathione, Hyaluronic Acid, Hydrogenated Lecithin, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate, Polyglyceryl-10 Oleate, Asiaticoside, Hedera Helix (Ivy) Extract, Madecassic Acid, Asiatic Acid, Fructan, Glucose, Paeonia Albiflora Root Extract, Portulaca Oleracea Extract, Allantoin, Hexylresorcinol, Artemisia Vulgaris Leaf Extract, Rhodiola Rosea Root Extract

The list of ingredients is subject to change. Please consult the packaging of the product purchased.