No.5 Vitamin Concentrated Serum, Dark Spot Care, Glutathione & Vitamin Serum, Korean Skincare, Tranexamic Acid 4%, Niacinamide 5%, for a Radiant-Looking Glow 1.01 fl oz

I have been using this product consistently for several months now, and I can honestly say it has become a permanent part of my skincare routine. In fact, I order a new bottle every month because I don’t want to run out of it. One of the biggest reasons I keep repurchasing it is because I have seen noticeable improvements in my skin. After I started using this product, many people around me began commenting that my skin looked brighter, healthier, and more radiant. It is always nice when other people notice positive changes, and that gave me confidence that the product was truly making a difference. What I love most is how lightweight and easy it is to use. I typically apply it two to three times a day, depending on how often I wash my face. The product absorbs very quickly into the skin. I usually apply it and gently tap it into my skin, similar to the way many Korean skincare routines recommend. Within moments, it is absorbed and leaves my skin feeling comfortable and hydrated. Unlike some skincare products that leave behind a sticky, greasy, or heavy feeling, this one absorbs beautifully without any residue. My skin feels fresh and smooth after each application, which makes it easy to layer with other products in my routine. I started noticing visible results within about two weeks of regular use. My complexion appeared more even, my skin looked brighter, and overall it seemed healthier. I also use other products that target pigmentation and dark spots, and this product works exceptionally well alongside them. Rather than causing irritation or conflicts with my other skincare products, it complements them and fits seamlessly into my routine. Over the months, I have noticed a gradual improvement in my overall complexion. My skin looks more refreshed, radiant, and balanced than it did before I started using it. The consistency of the results is what has impressed me the most. It wasn’t just a temporary improvement during the first few weeks. The benefits have continued with regular use. Overall, I am extremely happy with this product and fully intend to continue using it. It absorbs quickly, feels comfortable on the skin, works well with other skincare products, and has noticeably improved the appearance of my skin over time. If you’re looking for a product that can easily fit into your daily skincare routine and help support a brighter, healthier-looking complexion, this one has been a great choice for me.

The numbuzin No.5 Vitamin Concentrated Serum has become one of my favorite dark‑spot treatments. The formula is packed with glutathione and vitamins, and it shows — my skin looks noticeably brighter, more even, and smoother after just a couple of weeks. It absorbs quickly without any stickiness, and it layers perfectly under moisturizer or sunscreen. My complexion looks clearer and more radiant overall, and the glow lasts throughout the day. It’s gentle, effective, and feels like a real upgrade to any brightening routine. It does not cause irritation or breakouts like other vitamin formulas. If you’re looking for a serum that delivers visible radiance and helps fade discoloration, this one is absolutely worth trying.

It is Good, it visibly improves the look of dark spots, hyperpigmentation, and uneven skin tone. I like it Very Much. I have used it carefully, slowly, and it has helped my skin improve and look good over time. The Skincare item does even out skin tone well and boosts some natural radiance in the skin. It offers some hydration. I like how it enhances skin texture, and effectively diminishes the appearance of some dark spots and discoloration. It is gentle and has Helped and Improved My Skin and Face Very Much. I like how it improves the look of face skin for a fresher, more better good looking appearance. It helps to improve the appearance of skin. It does well with to visibly reduce the look of dark spots and post-acne marks. It is pleasant, decent, satisfying, nice and effective. I would Recommend this Skin item.

I’m almost done with the bottle, so I wanted to leave a review. I’ve tried several products from Numbuzin, and while their popular toner didn’t work for me (unfortunately), I decided to give this serum a try despite my initial doubts—and I’m pretty satisfied with it! This serum contains glutathione and vitamin ingredients, which are known for their brightening and skin-tone-evening effects. While it’s not a dramatic change, after using it consistently, I’ve noticed that my complexion looks a bit brighter and more even. It’s not a miracle worker, but it definitely helps to improve skin tone over time. The texture is nice and smooth, but it does feel slightly sticky when first applied. Because of this, I usually wait a little while for it to fully absorb. Once it’s absorbed, the stickiness goes away, and my skin feels soft and moisturized. It’s not a dealbreaker for me, but it’s something to keep in mind if you're in a hurry. Pros: Noticeable brightening and evening of skin tone with consistent use Contains glutathione and vitamin ingredients that are great for skin Good texture, leaves skin soft and moisturized The slight stickiness dissipates after absorption Cons: Slight stickiness that requires a bit of waiting for full absorption No dramatic changes, but subtle improvements with continued use Overall, I’m pleasantly surprised by the Numbuzin No.5+ Vitamin Concentrated Serum. It’s gentle on the skin, and with consistent use, I’ve seen a gradual improvement in my complexion. If you’re looking for a product with glutathione and vitamin ingredients, this is definitely worth trying!

Wow, wow, wow. I’ve been using this product 2x per day in combination with 15% Azelaic acid for five days and I already notice a difference in my hyperpigmentation. My skin is literally glowing. I will keep it up in the hopes that my hyperpigmentation fully clears. I’m just shocked that it’s working rapidly for me. I’ve tried so many products over the past three years and nothing has worked like this serum. I have no burning sensation when using it and it’s not greasy, so it’s perfect for my oily skin.

I learned about this product from YouTube. Since I have ultra-sensitive skin and unfortunately suffer from melasma, I was looking for something that would not irritate my skin while helping to protect it. So far, this product has been very good. A great bonus is that it is fragrance-free, which is very important for my sensitive skin. I have only been using it for two weeks, so I have not seen a significant difference yet. However, I believe that with time and consistent use, I will see results. Consistency is key!

’ve been using the numbuzin No.5 Vitamin Concentrated Serum every single day, and it has truly become a staple in my skincare routine. As someone with acne-prone skin, I’m always cautious with vitamin serums because many can feel heavy or trigger breakouts. This one has worked beautifully for me. The formula is lightweight, absorbs quickly, and doesn’t leave any sticky or greasy feeling. It layers well under moisturizer and sunscreen without pilling. Over time, I’ve noticed gradual improvement in dullness and post-acne marks. My skin looks brighter and more even, but still feels calm and balanced — not irritated or overwhelmed. Pros: * Lightweight and fast-absorbing * Gentle on acne-prone/sensitive skin * Helps with dullness and post-acne marks * Suitable for daily use Cons: *The quantity feels a bit less for the price, especially if you use it daily Overall, it’s a gentle yet effective vitamin serum that works well for everyday use. I just wish it came in a slightly larger bottle!

Es la primera vez que uso por lo que en resultados todavía no puedo decir si cumple sus funciones. El serum no irrita para nada, es fluido y gentil con la piel.

na

siero stupendo, lo ricomprerò di nuovo. la mia pelle è più luminosa e presenta meno macchie. sto provando il siero ogni giorno e funziona!!!!

It doesn't have any effect. It's just a waste of money. Also, the customer service is terrible. Although they promised a return, as advertised, the seller refused to process the return. Overall rating is 0, if that were an option. I do not recommend it. You can buy much better products from well-known brands for the same price.

Al aplicarlo de noche , al día siguiente se siente muy bien la piel, si me gustó , y n cuánto a las manchas aún no veo cambios notables pero siento que con el uso constante si puede funcionar.

What I LIKE about it: 1) PACKED WITH VITAMINS — The Numbuzin #5 serum is loaded with vitamins, especially vitamin C, and has really helped brighten up my complexion. After using it for a few weeks, my skin looks noticeably more radiant and even-toned. It’s perfect if you want that natural glow without makeup! 2) SO LIGHTWEIGHT AND ABSORBS QUICKLY — The texture is smooth and lightweight, so it doesn’t feel heavy or sticky. It absorbs in seconds, leaving my skin soft and prepped for other products. Great for layering with other serums or creams without any pilling. 3) GENTLE ENOUGH FOR DAILY USE — I was worried it might be too strong, but it’s actually quite gentle. My skin hasn’t had any irritation, even with daily use, and it feels more hydrated and healthy over time. DISLIKE: The only downside is the bottle size—I go through it fairly quickly, and a larger option would be amazing! I hope you found this review HELPFUL. Makes reviewing worthwhile. Thank you.