Deciem The Ordinary Niacinamide 10% + Zinc 1%

I think their products are pretty overhyped but I think people love their products because of their affordability.I didnt like this product at all every time I would put it on my skin overnight I would get big splotchy flat pus filled bumps on my face that were kinda painful.Once I stopped using it they would go away.I was gonna give it to a friend but I’m scared it might break her out so I’m gonna have to dump it.I realllllyy wanted it to work.

I've been using this daily for about a month and it has been amazing for my super oily skin. I am so, so happy I found it! I squirt about half a pipette into my usual blob of EltaMD UV Clear sunscreen in the morning, apply (making sure I cover my t-zone well), wait for it to dry, and then put on makeup (liquid foundation with a beauty sponge). I have never had an issue with it pilling or balling up. My makeup lasts so long because I BARELY get oily!! I previously had to blot basically all day long and now I blot once, MAYBE twice the whole day. I'm so excited about this product. I think it may be lightening my acne scars and brightening a bit as well, but the most noticeable result has definitely been for my oily skin. Also, I am very acne prone and it has not broken me out. So happy this works so well!

I'm on my second bottle so I think I can review the Niacinamide and give a true response. I use it on the nights that I don't use my retin-a, so that is every other night. I have noticed that my pores are smaller, my hooded eyelids aren't drooping as much and my skin seems a bit tighter. I follow it with The Ordinary Hyaluronic Acid 2%*B5. I've been using Retin-a for a long time so I can't say that this is all from the Niacinamide but for the price I'll keep using it.

This is one of those super confusing products that on first application has the potential to be deemed useless. You know what I mean? With more sensory products such as oils, masks or rich creams some basic part of you goes "ooh that feels like its doing something". Where as this Hyaluronic Acid serum, which is pretty much scentless and has a gloopy transparent appearance when dropped out of its pipette, immediately sinks in to your skin and your skin just feels, well, normal. Being that it's a water based product it completely absorbs and dries to leave your skin feeling as naked and fresh as it does straight after cleansing. But do not be fooled. It's packed with clever science and is a real hero product.

I've bought 2 bottles of it and I've just finished the first one (2.5 months, used 1/day). Initially I thought it was working very well as I got fewer breakouts but I'm no longer sure, perhaps my skin got used to it or something else is messing me up. But I will keep on using it and may change my review once I'm done with the 2nd bottle. I've tried using it 2/day but I found that it wasn't working well under sunscreen and make-up. The packaging is a simple dropper - I think a pump would be more suitable as it's rather runny. Still, for the amazing price it's definitely something worth trying, it seems to be working well for some!
P.S. Before I found The Ordinary range, I considered trying Paula's Choice 10% Niacinamide Booster which seems to be the same stuff but at (literally) 10 times the price! Thanks Deciem for looking after those who have smaller budgets :)

I have an oily, red & stubborn skin. Not much products works well on me. But this product works so well on my skin. It reduces the redness & smoothen out my skin texture. I fell so hard for this product & will definitely re purchase!

I so wanted to like this! But it breaks me out every time. I get huge cysts and red pimples with white heads all over my face.
So far it is the only The Ordinary product I don't like

Can be drying if you go overboard, but definitely clears up congested, clogged skin after a couple days of use. I use it once per day when I feel my skin needs to be purified. I will cleanse, use my chemical exfoliant (wait 15 min), then hyaluronic acid, then this (wait for it to sink in) and then moisturizer or an oil.

I use this as a spot treatment. I tried using on my t-zone where open pores are the worst and also on some marks on cheeks as Niacinimide is supposed to be good for that kind of thing i.e pigmentation but didn't do anything for that, in fact started getting new spots and can only put it down to this product as wasn't using anything else at the time. Luckily not exp at all so hardly wasted any hard earned money here. But good that I can use on the odd spot every now and again as it calms them down almost overnight. For that alone I would re-purchase.

I really love this product BUT when it comes to The Ordinary, nothing is a one-size-fits-all kind of product. I have combination skin, t-zone is oily with visible pores and pre-menstrual acne flares, outer parts of face get a little dry and I am prone to seborrhoeic dermatitis and flaking around my nose, mouth and chin. Yes I know, sounds beautiful LOL

Anyway, as I have issues with oiliness and excess sebum production, pre-menstrual inflammatory acne lesions, and when SD appears in the summer there are hyperpigmentation issues to boot. Niacinamide, also called nicotinamide, is a variant of vitamin B3, niacin (or nicotinic acid). Applied topically in concentrations of 4% daily for 4 weeks, studies in Japanese women found consistently reduced rates of sebum production, decreased number of inflammatory acne lesions, and improvement in pigmentation issues. It's great stuff, and has certainly helped my skin look less oily and blotchy while reducing both the number of spots and the length of time they stay red and angry on my face. Best of all, it's quite cheap - I like TO's one since it's £5 for 30mls at 10% strength, whereas the Freederm gel is £5 for 10g of 4% strength. But still, it won't break the bank if you were to buy that one instead. I use this one just because I get the most for cheapest, and I like the little pipette design so I can mix a few drops into my moisturiser. I'm not convinced the addition of zinc does much but it is known to have antibacterial properties so maybe it is some help, who knows.

Most people will tolerate niacinamide well, but some people are sensitive to the niacin/nicotinic acid forms and this can cause flushing and irritation on the skin of some people. Niacinamide can be partially converted into niacin on the skin if it comes into contact with acids, like vitamin C treatments - or even naturally occurring ones in the skin's acid mantle. It's only a tiny amount but for people sensitive to it, it can cause the unpleasant symptoms noted above, and is why niacinamide doesn't agree with everyone.

So yes, some people will want to give niacinamide a miss. At least it is fairly cheap so you won't be left too out of pocket if it doesn't agree with you. Worth trying if you have issues with oily skin, inflammatory acne, or pigmentation issues and want to see if it helps!