numbuzinNo.5 Serum | Tranexamic Acid 4%, Niacinamide 5%, Glutathione, Vitamin C | Vitamin Concentrated Serum | Hyperpigmentation| Suitable for Sensitive Skin, Korean Skincare | 1.01 fl. oz.

3-MONTH RESULTS (2x day):Slight fading of deep dark acne scars and age spots. Evens out skin tone. Gentle and not irritating. I am guessing this will take 6 to 9 months for deeper scars to fade. The pamphlet on Yesstyle.com shows 9.65% improvement in Blemishes after 4 weeks and 18.9% for even skin tone (this means expect slow steady results). They recommend also using the toner pad for faster results (165% improvement) but the combo irritated my skin. Overall, I like that it is gentle and will continue using it, right after the Toner.KEY INGREDIENTS:Contains the right chemicals known to fade dark spots like Glutathione, 4% Tranexamic Acid, 5% Niacinamide (both suppresses melanin), Alpha-Arbutin, Vit C, 3-0-Ethyl Ascorbic Acid, Tumeric etc.TEXTURE:Light serum, not sticky, absorbs quickly after Toner. Tap face gently for a few seconds after applying to help the skin absorb quicker before adding the next product (tip from korean skincare companies that works).ACNE PREVENTION TIPS: Best way to see improvement of skin is to keep the pores clear and acne from re-surfacing. I have not had a single breakout in 3 months using this routine. Also changed my skin type from Oily Combo to Normal.STEP 1 (2x day) - Use SEBUM CONTROL TONER to regulate skin oil production (I use NUMBUZIN No. 1 blue bottle)STEP 2 (2x day) - Use ANTIBACTERIAL SERUM to reduce inflammation (I use Beauty of Joseon Glow Serum w/60% propolis, Tea Tree)STEP 3 (2x week) - EXFOLIATE to keep pores clear, as clogged pores breed acne. I use Beauty of Joseon Ground Rice and Honey mud mask. Leave on face and neck for 15 minutes; this is a very gentle product. STEP 4 (Optional) - EAT food that aide the digestive system and help prevent acne like Yogurt, Kimchi and Sauerkraut (eat small amounts 2-3 times a week).I hope these tips are helpful to everyone.

After viewing some information and reviews on this serum, I decided to give it a go. This serum has by far exceeded my expectations in words I cannot describe. I’ve never used anything that has given me such visible results in this short time and I am mad at myself for not taking before and after pictures. I was told that there was nothing that really helped hyperpigmentation, but they were wrong! This serum has visibly reduced my hyperpigmentation in a week and a half, so much that even my preoccupied football fanatic husband said my face didn’t look patchy and brown anymore. (Gee, that’s nice). Of course your mileage may vary, but this has been a completely, unexpected, undeniable change that I would admonish anyone who didn’t at least try this for themselves. Again, you may not get the same results as I did; but I think it’s worth a try

Numbuzin No. 5 serum is excellent! It absorbs quickly, feels light on the skin, and leaves my face glowing and hydrated. It blends perfectly with the other products I use and layers beautifully. I've noticed a real improvement in texture, tone, and it has visibly reduced dark spots. Highly recommend!

If you're looking for a brightening serum that delivers results without compromising skin barrier health, this is a good choice. It has a great blend for anyone dealing with hyperpigmentation, dullness or uneven skin tone. It’s gentle yet effective, absorbs quickly, layers well under moisturizer and sunscreen and leaves the skin feeling smooth and hydrated. There’s no irritation or purging and no strong scent. It is slightly pricey though but a little goes a long way. Just be consistent with use.

This is my second bottle and I love it! It makes my skin look even and radiant. It's perfect for my oily skin because it doesn't feel greasy and absorbs well when you apply it. I can wear makeup over this serum and it'll be fine.

This serum has become a favorite in my morning routine. I’ve been using it with a vitamin C toner and I’ve noticed visible improvement in my skin’s texture and brightness. It layers well with other products and absorbs quickly without any stickiness. The formula is gentle enough for my sensitive skin but still feels effective—especially for fading dark spots and evening out skin tone. A must-have, especially during the summer when hyperpigmentation becomes more noticeable.

Partnered with the toner #5 this is the only Vit C that is having any positive effect on my melasma in quite some time. Very pleased with this product. Just ordered another bottle and I'm not even half way through the current bottle. Glutathione seems to be the magic ingredient for me. Love it

If you have sensitive skin, I highly recommend doing a test patch first. Sadly, I got an allergic reaction from using this product but my skin is very sensitive though.