No.5 Glutathione Vitamin Concentrated Serum.

"Whether you're someone like me that uses it when you see those breakouts happening and you want them to fade instantly, maybe you're someone with existing hyperpigmentation that wants to boost the results that you're getting with a two-week course of this, or maybe you're someone that's new to fading dark spots and discoloration and wants to start with something that really delivers in the shortest possible time. This is just a little miracle. It's got all your actives that you need for hyperpigmentation. Glutathione is doing a lot of the heavy lifting here, but there's lots of other actives in here that really help. I find doing it in two-week bursts works best for me. I would fully recommend this. If you're on a hyperpigmentation journey and you want a flash two-week treatment that's just going to take you results from here to here, get this. You won't look back. So good. And if you're an acne sufferer like me, that's a little dream."

"This is the much more affordable version and actually the cheapest product on this list. One of these vials gives you a two week supply, and the brand claims that within two weeks, people saw a 10% reduction in hyperpigmentation and the appearance of dark spots and discoloration. I tried it and it actually works. It genuinely works. You've got vitamin C, tranexamic acid, and glutathione all in really high doses, and the freshness is what makes it unparalleled. I would just caution people to use it for those two weeks and then use something else to maintain. If you just want to kickstart your hyperpigmentation, super turbocharge it, and then use something to continue, this is a great two week cheat that is just going to get your hyperpigmentation under control. A 10% reduction in hyperpigmentation in two weeks is unheard of with any other product and it's noticeable. You will be able to see the results before and after."

"This is the best way of kicking off a hyperpigmentation routine. I don't use it every day because I feel it works best if you use it for about a month and then move on to maintenance, and it'll tackle your hyperpigmentation within a month if you're consistent with it. It comes with two vials, each lasting two weeks, so a month's worth of product. I use it as a one month flash fix to get on top of things, and I'd say it's the strongest hyperpigmentation serum that exists on the Korean skincare market."

"I've been using this more as a spot treatment under my patches, which helps with the bad smell of the product and with general peeling, though I don't think I really experienced peeling myself. I'm not going to finish this in two weeks like I thought, so it's lasting longer than I expected. In a week of use I feel like I'm already seeing results from this, though I have been pairing it with the Edom so maybe it's a synergistic effect. I'm wondering if this is the hyperpigmentation treatment I've been looking for."

"I hate to put this third in the video because my goodness, the ingredients look great, I love the system here, but as much as I don't like admitting it, I am affected by stinky skin care. I still smell this on me and it makes me feel a bit self-conscious. It's a two week supply, so we will give it a fair go, but it's hard to be that excited when a product smells that bad."

"This one's really nice at 26 bucks."

"This is their number five glutathione vitamin concentrated serum, which is $15. It's just a super nice lightweight serum that's great for brightening skin. It's also a great daytime serum because it has some nice antioxidants. It gives you some antioxidant protection. [...] This one has several great brightening and antioxidant ingredients. It's got tranexamic acid, bifida ferment, which is great for soothing. It's got alpha arbutin for brightening, turmeric, great brightening and antioxidant. Then we've got ethyl ascorbic acid and ubiquinone, which is super great. I think CoQ10 is the name people might recognize, but this stuff is wonderful. No scent to it, super affordable at 15 bucks. You can't go wrong with a lot of stuff from Numbuzin."

"This one's fragrance-free. It does have a strong scent that's a little bit like metallic. If you've used an ascorbic acid serum you're probably familiar with it but it does have that scent but it doesn't have any fragrance in it. For brightening ingredients this one's got a ton of them. It's got sea buckthorn water which is a great antioxidant brightening ingredient. We have tranexamic acid. We have niacinamide. We have ascorbic acid. We've got alpha lipoic acid, ubiquinone and then glutathione. So it's got a ton of brightening ingredients. It's a very strong serum you'd want to use this probably in your morning routine in place of vitamin C serum. You don't want to use this with vitamin C. I would recommend if you're going to use this, apply it in the morning after cleansing. Give your skin 2 to 3 minutes for it to soak in and then apply your moisturizer, sunscreen, all of that."

"The Numbuzin No.5 Glutathione Vitamin Concentrated Serum was great. It helped brighten my skin up a touch, which I need, obviously, all the help I can get. It's more of a two- to three-week type treatment. You're supposed to use it as a concentrated vitamin C serum in the morning, and then after a couple weeks, once you're finished, return to your normal vitamin C serum, or you can repurchase it. It's got some nice brightening ingredients. It did have a strong vitamin-ish scent, which I was not a fan of, but it does dissipate pretty quickly."

"It helped brighten my skin. My skin needs all the brightening it can get. Works nicely in place of my typical vitamin C serum for a few weeks. The texture is light, so it's pretty easy to fit into any routine. For skin that has hyperpigmentation or brightening issues, it's certainly worth trying out. After two weeks, I did see a subtle brightening of my skin, which it needs a lot of brightening. I do think this helped brighten up my melasma a bit. The nice thing with this one is it's friendly for all skin types, including dry, oily, and acne-prone skin. No issues at all with that. It didn't sting it enough to where I wanted to discontinue it or rinse it off, though if you have very sensitive skin or maybe skin that is fresh off of a procedure or laser something like that, I'd probably hold off on this one a little bit. I'd be interested to do another one of these and then see if I could make this product last a month, but I just wonder how effective and efficient it is after it's been opened that long."

"This one is not nearly as thick, but it's still creamy. When you open a bottle of vitamin multivitamins, it has like that smell. I guess vitamins smell. That's the only way I can describe it. Otherwise, this product feels nice. I have pretty dry skin, so take that as you will. It's got some fatty alcohols, shea butter, niacinamide, macadamia oil, betaglucan, ectoin, adenosine, and ceramides. It's got some silicones in there. Feels nice and thick, but not like the bubble soft one that's so thick where it's like whoa, for daytime way too much thickness, but this one's a little bit more friendly. So it feels nice."

"It's a very concentrated ampule for helping with hyperpigmentation and dark spots. It's got tranexamic acid, glutathione, ascorbic acid, alpha lipoic acid, and ubiquinone in there. It looks quite nice. Doesn't look like it has any fragrance in it or anything. This is also sitting in my cart. Once I hit the free shipping limit, I'll definitely put it in."