ONE THING Niacinamide Glutathione Serum 50ml
$ 38 USD
Revitalize your skin with the ONE THING Niacinamide Glutathione Serum! Packed with a potent blend of 50,000ppm Niacinamide and Glutathione, this serum works tirelessly to brighten your complexion, reduce pigmentation, and promote an even skin tone. Infused with Tangerine Peel Extract for gentle hydration, it’s your go-to solution for achieving that coveted radiance and clarity, all while enjoying a 30% discount!
Curated in Seoul — trusted skincare straight from Korea’s beauty capital.
Official Korean distributors — 100% verified and authentic products only.
Authenticity guaranteed — full refund if not satisfied.
Frequently Bought Together
24-hour Vitamin Radiance & Toning Care
Point 01: Enhanced Skin Brightening with Niacinamide & Glutathione
- Niacinamide (50000ppm) helps to inhibit the movement of melanin (the pigment responsible for skin color), reducing pigmentation in the skin’s epidermis and promoting skin brightening.
- Glutathione works to create a more even skin tone by brightening up patchy or uneven areas.
- Tangerine Peel Extract: Contains Vitamin B1 and B2, which help to maintain a clear and bright complexion, giving your skin a transparent, clean appearance.
Point 02: Vita-Tree Complex for Complete Skin Nourishment
- This serum is enriched with 7 types of vitamins that supply essential nutrients to the skin, helping it maintain a radiant glow for 24 hours.
- Tea Tree Extract helps calm the skin and supports gentle, effective brightening care, making it suitable for sensitive skin.
Point 03: Proven Results in Just 7 Days
- This serum has been tested for skin irritation and is confirmed to be gentle and non-irritating, making it safe for daily use even on sensitive skin.
- You can expect noticeable improvements in your skin tone after just one week of use.
Point 04: Hydrating, High-Concentration Serum
- The serum is highly concentrated, providing rich hydration without leaving a sticky or greasy residue. It absorbs quickly and finishes with a refreshing feel.
How to Use:
- After applying toner, dispense an appropriate amount of the serum and evenly apply it across your face. Gently tap to help it absorb.
- For targeted care on specific areas, apply 1–2 drops directly to those spots and gently tap to help it absorb.
This serum is perfect for brightening your skin, evening out your complexion, and maintaining a glowing, healthy look all day.


12 reviews for ONE THING Niacinamide Glutathione Serum 50ml
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Cassius Renaud from Lyon, France (verified owner) –
Depuis que j’utilise le sérum à la niacinamide et glutathion, ma peau rayonne vraiment. J’ai observé une diminution visible de mes taches sombres. Une merveille !
Amira from Cairo, Egypt (verified owner) –
اعتمدت مؤخراً على سيروم Niacinamide Glutathione لعنايتي بالبشرة، وكلي ثقة في تأثيره. غطاء شفاف للون بشرتي ولتحسين نقاوتها بفعل مكوناته المبتكرة مثل النياسيناميد ومستخلص الجوافة الذي قلل من تصبغ المناطق غير المتجانسة بصورة ملحوظة خلال أسبوعين فقط! بحلول الصباح التالي لا أشعر بحاجة إلى استخدام أي منتج أساسي للمكياج نظرًا لإشراقة بشرتي التي تكتسب دفعة كبيرة وطبيعية بمجرد استعمال السيروم. أنصح كل سيدة تعيش في قلب المدينة الكبرى كالقاهرة بتجربة هذا المنتج العجيب. الإنتعاش والبريق يصبحان أصدقائك منذ اللحظة الأولى.
Valeria Hernández from Barcelona, España (verified owner) –
¡Hola! Quería contarte sobre el serum de ONE THING. Desde que empecé a usarlo, mi piel ha brillado como nunca antes. La combinación de niacinamida y glutatión está ayudando con esas manchitas molestas que no me dejaban tranquila. Y el extracto de cáscara de mandarina le da un toque fresquito muy rico, además he notado mi cara más uniforme en tonos sin tantas irregularidades ya sabes? Es increíble cómo se siente; casi siento la luminosidad durante todo el día.
Amara Jensen from Toronto, Canada (verified owner) –
In just a week of using the One Thing Serum, I’ve noticed vibrant improvements—my complexion beams and uneven spots have become mere whispers. The essence truly nourishes beneath the surface, offering tranquility with each drop.
Hannah Peters from Toronto, Canada (verified owner) –
I recently began using the One Thing Niacinamide Glutathione Serum, and it’s been quite a journey! This blend captures both tradition and modern innovation—often neglected in the skincare realm. Living in vibrant Toronto, where sun exposure is unforgiving at times, I’m grateful for how niacinamide steps up to shield my complexion from its wrath. There’s a unique spark with every application; the tangerine peel extract enhances vitality not just on my skin but lifts my mood too. I’m mesmerized by how these ingredients come together seamlessly while revealing their luminous essence over days rather than weeks—a real gem!
Claudine Fournier from Lyon, France (verified owner) –
Cette sérum illumine ma peau de façon étonnante! Les irrégularités disparaissent, laissant un éclat sain que j’ai toujours désiré. Une vraie révolution pour mon teint!
Camille Thorne from Los Angeles, California (verified owner) –
From the sunny corners of Los Angeles, I’ve discovered this gem known as the ONE THING Niacinamide Glutathione Serum. Applying it feels akin to indulging in a velvety embrace! What captivates me is its rich infusion of ingredients that deftly address uneven skin tones; think patchiness just fading away with diligent use over time. The interplay between niacinamide and glutathione creates a radiant synergy like those beautiful sunsets here by Venice Beach—a burst of vibrancy no one can ignore! Coupled with essential vitamins from nature’s bounty—it’s pure alchemy for any urban dweller weary from pollution-induced fatigue. And let me tell you, there’s something thoroughly invigorating about standing under clear Californian skies while sporting a luminous glow.
Zara Toh from Singapore –
Hey! So I recently tried the ONE THING Niacinamide Glutathione Serum, and honestly? It’s a vibe. The way my skin brightens up after using it feels like magic or something. It just gives this clean glow without feeling greasy, super important for us humid weather warriors here in Singapore. Plus, that little kick from the tangerine peel—totally refreshing! No more dull days for me!
Eliana Jaramillo from Cartagena, Colombia –
Every morning feels like a new beginning! This serum revived my dull, tired complexion. It’s like liquid sunshine in a bottle. Highly recommended!
Emma from Austin, USA (verified owner) –
I recently tried the ONE THING Niacinamide Glutathione Serum and I’m quite impressed with its results. The high concentration of niacinamide (50000ppm) has significantly helped reduce my pigmentation issues, leaving my skin looking more even-toned. Additionally, the inclusion of tangerine peel extract added a lovely clarity to my complexion without causing any irritation. I love how it absorbs quickly into the skin and provides lasting moisture throughout the day, thanks to its Vita-Tree Complex enriched with seven essential vitamins.
Jessica from Austin, USA –
I’ve been using the ONE THING Niacinamide Glutathione Serum for a few weeks now, and I’m genuinely impressed. The niacinamide content helps to reduce my pigmentation and has visibly brightened my skin tone. Alongside that, the addition of glutathione works wonders in evening out patchy areas, giving me a more uniform complexion. I also love how it includes tangerine peel extract; it makes my skin feel fresh and clear without being oily or heavy.
Emily from Austin, USA (verified owner) –
I’ve been using the ONE THING Niacinamide Glutathione Serum for a month, and I’m genuinely impressed. The high concentration of niacinamide (50000ppm) has significantly reduced my dark spots, making my skin tone much more even. Additionally, the tangerine peel extract contributes to that radiant glow while also helping maintain clarity in my complexion. My skin feels nourished thanks to the Vita-Tree Complex packed with vitamins which make it look healthy throughout the day. Overall, this serum is a game changer for anyone dealing with pigmentation issues.