I like this product a lot! Feels like high-end skincare but with a low price tag

The product itself is great, but on the product page it says, it shouldn't be used at the same time as vitamin C, which should be alternated AM/PM. Now i use vitamin C in the AM, and retinol in the PM, so when should i incorporate niacinamide? The product info says it could react with vitamine C, but after reading about it online, it seems that the chemical reaction leading to inactivation of vitamin C would need 120 degrees Celsius to happen... so im guessing thats not a concern on my skin..i would like a bit moreinformation, why not to use vitamin C and niacinamide together.

This product was reviewed on deciem.com

The Ordinary's Niacinamide serum is truly a holy grail product in my routine. I cannot live without it, especially with my hyperpigmentation and acne! I even got my boyfriend hooked on this serum; it's cured his acne, he loves it.

This product was reviewed on deciem.com

This serum is clear, if a bit sticky but quite gentle. I paired this with niacinamide toner and it never pilled nor irritated my skin. I would apply before retinol and my skin would absorbed this beautifully. I really liked it and plan on repurchasing.

This product was reviewed on deciem.com

I was battling insane hormonal acne all over my face, neck, shoulders, back, and chest for about a year and a half and nothing I used would help. So I decided to give this a try as a desperate last resort... and I am SO happy I did. It has cleared up all of my acne, everywhere and made my skin look brighter and faded my acne scars. It didn't take long at all to start seeing results (I actually saw improvement the next morning). I can't say enough good things about this product. I will be using this for the rest of my life. If it were to be discontinued I would legit ugly cry for days. This saved my skin and helped me get my self esteem back. I most definitely recommend this product!

This product was reviewed on deciem.com

I love this. I’ve noticed that when using niacinamide in general, I get fewer pimples, so it clearly helps with that. When using this particular serum, I’ve also noticed my combo skin being less oily. I can’t say I’ve noticed a visible difference to my uneven skin tone, although studies show niacinamide does have an effect. It’s easy to apply and absorbs quickly.

This product was reviewed on deciem.com

Only just started using this product as taken me so long to decide which The Ordinary products to go for. I noticed the new bottle was only 3/4 full, quite a gap at the top, is this normal or is this a tampered bottle? It’s didn’t have any safety hygiene seal on it. I ordered from Boots. Thx

This product was reviewed on deciem.com

I’ve been using this for a year now and my face has never looked better. This is my holy grail!!!! Highly recommend

This product was reviewed on deciem.com

Using this product about a two month now and its amazing how it changed my skin. No more dryness! My skin is hydrated, more bright and more tighter. Thank you The Ordinary!

This product was reviewed on deciem.com

I started using the ordinary niacinamide both AM/PM. I have to say that my skin get brighter after using for a month but it come with some consequences. For AM, I use sunscreen for blemish screen after the niacinamide which control my blemish skin well. But while using it in the PM, the niacinamide alone make my skin gets more oily (as it already was) after 10-20 minutes, though this product says to control sebum production. please let me know if it is normal to happen after this product usage?

This product was reviewed on deciem.com