Maeyoung Niacin Toning Serum

A toning serum that absorbs in 3 seconds and visibly targets dark spots in just 3 days

This serum features a patented nano-micellar idebenone complex that enhances skin absorption, delivering brightening actives quickly and effectively. Formulated with a triple brightening system—5% high-concentration niacinamide, tranexamic acid, and glutathione—it intensively targets dull skin tone and lingering dark spots. The watery gel texture bursts on contact like water, leaving a fresh, non-sticky finish. Certified as a dual-functional cosmetic for both brightening and wrinkle improvement.

Clinically proven hydration and dark spot improvement

In human application tests, a single use improved hydration by 254.9% across 20 layers of the stratum corneum. After 3 days of use, melanin in pigmented areas (dark spot marks) decreased by 16.5%. By 4 weeks, improvement reached 29.6%. Completed both low-irritation and sensitive skin suitability tests, making it gentle enough for daily use on even reactive skin.

Ingredient design for every skin tone concern

Each key ingredient plays a distinct role:
- Niacinamide (5%): Evens skin tone and visibly reduces dark spots
- Tranexamic Acid: Blocks melanin transfer to manage hidden pigmentation
- Glutathione (98% purity): Inhibits melanin production for foundational tone care
- Patented Idebenone Complex: Nano-micellar technology (10nm) enhances ingredient absorption

Recommended for those with lackluster, dull-looking skin, anyone seeking dark spot care and a radiant complexion, and those looking for a high-concentration serum without the sticky feel. Enriched with sea buckthorn water for added hydration, and finished with a subtle citrus-herb scent for a refreshing sensorial experience.

Use after toner, before moisturizer

After cleansing and toning, apply this serum during your essence or serum step. For best results, layer it over May Young Vegan Moist Essence Toner to calm the skin first — this can help minimize any sensitivity to niacinamide. Follow with your moisturizer once the serum has fully absorbed.

Morning and evening use

As a dual-function brightening and anti-wrinkle product, it fits seamlessly into both your AM and PM routines. In the morning, always finish with SPF. At night, focus on areas of hyperpigmentation to help target the day's accumulated fatigue and uneven tone.

Gently press and roll to absorb

Dispense 2–3 drops with the dropper and spread evenly across your face. Gently roll your palms over the skin — the watery texture will burst and sink in quickly. For areas with dark spots or dullness, apply a second layer for targeted care.

Routine pairings by skin concern

• Dark spots and hyperpigmentation: Follow this serum with a vitamin C cream to amplify brightening results
• Dryness with dullness: Seal in the serum with a rich moisturizer for a hydrated, luminous finish
• Firming care: Alternate this serum with a retinol treatment on different evenings to address both brightening and anti-aging

Storage and usage notes

Use within 12 months of opening and store in a cool place away from direct sunlight. Suitable for sensitive skin-tested, but if redness or itching occurs, discontinue use and consult a dermatologist. This formula contains a high concentration of niacinamide (5%) — if you're new to the ingredient, start with a small amount and gradually increase as your skin adjusts.

Water, Propanediol, Niacinamide, 1,2-Hexanediol, Glycerin, Carbomer, Polyglyceryl-10 Laurate, Tromethamine, Polyglyceryl-10 Myristate, Hydrogenated Polydecene, 3-O-Ethyl Ascorbic Acid, Tranexamic Acid, Ethylhexylglycerin, Adenosine, Hydrogenated Phosphatidylcholine, Disodium EDTA, Butylene Glycol, Coptis Japonica Root Extract, Rosmarinus Officinalis (Rosemary) Leaf Oil, Sodium Lauroyl Glutamate, Mentha Arvensis Extract, Citronella Oil, Glutathione, Lavandula Angustifolia (Lavender) Oil, Litchi Chinensis Fruit Oil, Hippophae Rhamnoides Water, Candida Bombicola/Glucose/Methyl Rapeseedate Ferment, Dipropylene Glycol, Ethoxydiglycol, Hydroxydecyl Ubiquinone, Helianthus Annuus (Sunflower) Seed Oil

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