The Ordinary Niacinamide Reviews & FAQ’s

  • 84% of the Deciem Addicts love it
  • 78% say Niacinamide has improved their skin
  • 80% of the Deciem Addicts will repurchase

The Ordinary Niacinamide reviews by the moderators of the Facebook Group and the Deciem Addicts. Did you know that The Ordinary Niacinamide is the best selling product from The Ordinary?

NEW PRODUCT ALERT! The Ordinary 100% Niacinamide Powder is now available

The Ordinary Niacinamide Reviews
84% of the Deciem Addicts love Niacinamide. Niacinamide was voted the best product by The Deciem Addicts and is Deciem´s best seller. Niacinamide is now available in 60ml.

What is The Ordinary Niacinamide and what does it do?

Deciem´s simple explanation: Niacinamide, also known as Vitamin B3, is a high-strength vitamin and mineral formula that helps to support barrier function while reducing the appearance of visible shine and signs of congestion.

This ingredient has also been shown to have a brightening effect on the skin, making it a truly multifunctional ingredient that can be easily incorporated into any routine. We have included Niacinamide at a high 10% concentration within this formula. ⁣⁣⁣Additionally, this formula includes a 1% concentration of Zinc PCA, which works to support the skin’s function as a protective barrier. ⁣

78% of the Deciem Addicts on Instagram say it has improved their skin.

Niacinamide Targets

  • Brightens skin
  • Regulates Sebum
  • Minimizes Pores
  • Signs of congestion
  • Support the skin’s function as a protective barrier

How and when do I use Niacinamide?

  • You can use Niacinamide in the morning and evening.
  • Avoid the eye area when applying. This isn´t mentioned on the Deciem regimen guide but Deciem said this to a customer on social media. See faqs below.
  • Niacinamide is a water-based product and would be applied as one of your first layers, before anhydrous, oils, and creams.
  • You can read all about layering The Ordinary here.
Squalane Cleanser
Hyaluronic Acid
Ascorbyl Tetraisopalmitate
Natural Moisturising Factors
Squalane Cleanser
Glycolic Acid 7% Toning Solution
Alpha Arbutin 2% + HA
Rose Hip Seed Oil 
Squalane Cleanser
Borage Seed Oil
Azelaic Acid
These are examples of some routines including Niacinamide

Some Examples of where Niacinamide will fit into your routine. Find these personalised The Ordinary routines here.

Which products can and cannot be used with Niacinamide?

Deciem do not recommend using their Niacinamide with any of their vitamin cs now including derivatives. Before it was pure vitamin c only and now derivatives are included.

We do not recommend combining Vitamin C (L-Ascorbic Acid, Ethylated L-Ascorbic Acid or Vitamin C Derivatives) with Niacinamide with Direct or Ethylated Vitamin C, and Vitamin C Derivatives due to the formation of a salt complex that has the potential to reduce the integrity of both compounds. If you wish to combine both products into a regimen, we recommend using them on alternate days and/or nights. 

How to patch test The Ordinary Niacinamide

There is a whole guide on the Deciem website about how to patch test the products.

  • Apply a small amount of the product onto a clean area of skin on the upper forearm.
  • Keep the area dry.
  • After 24 hours rinse the area.
  • If any redness, burning, itching, blistering or irritation is observed at any time throughout the test, do not use the product.

Please be aware that it is still possible to have a reaction when you apply Niacinamide to your face. Therefore, it would be a good idea to spot test this on your face before applying it all over even if your patch test was ok.

The Ordinary Before & Afters

We have some amazing before and after posts in the Facebook Group. You can find posts by going to topics – before/after.

The Ordinary Niacinamide Reviews

There are also some amazing before and after photos in the Facebook Group. Please always patch test this product. Whilst this is the best selling The Ordinary product there are also many people who really do not get on with this, so please do read all the reviews.

Read more reviews by the #deciemaddicts on Instagram here.

Jen @jamjarskingeek Niacinamide – my absolute favorite product from The Ordinary. It’s a multi-purpose gem that supports my skin barrier, helps with pigmentation, and keeps my oily skin in check. I wouldn’t be without it and love the new large size

I reach for The Ordinary Niacinamide whenever my skin is playing up. It goes so well with many other Deciem products.


Niacinamide has changed my life.

Niacinamide has really helped. Less redness and balanced sebum production.

Love Niacinamide. It has been great for my rosacea

Yes Niacinamide 💯 best thing I´ve ever used.

My skin has gone from ‘dry’ to ‘normal’ even with prescription strength retin A . It’s helped to keep my skin moisturized! I’m obsessed with this product and use night and day.

I’ve been using The Ordinary’s Niacinamide for 2 yrs now. My skin loves it. I have oily skin prone to breakouts and this makes my skin look amazing.

Niacinamide has tightened my pores and helped with blemishes.


These faqs have been asked and answered by Deciem on social media.

Can I use Niacinamide around the eyes? Niacinamide is not formulated for the eye area.

Is it ok to use The Ordinary Lactic Acid 10% on top of Niacinamide? You may apply Lactic Acid before Niacinamide.

Can this be used with AHA/BHA products at the same time? After rinsing off the AHA 30% + BHA 2% Peeling Solution, you may apply Niacinamide.

Is it possible to still breakout with the 10%? Purging is possible with any products that effect the skins behaviour.

Can I use The Ordinary Alpha Arbutin, Niacinamide and Retinol in the same routine? Yes you may! Generally, we recommend applying water-based solutions first, followed by anhydrous or oil formulations, and finally cream/suspension formulas.

What would come first? The Ordinary Niacinamide or Mandelic Acid? You may apply The Ordinary Mandelic Acid 10% + HA first.

Can I use Niacinamide + Alpha Arbutin + Glycolic Acid 7% Toning Solution + AHA and BHA peeling solution in the same routine? Which ones are essential for blemishes and dark spots? Niacinamide and Alpha Arbutin are great products to target your concerns. You may use your products in the same routine. However, we do not suggest the use of both AHA + BHA Peeling Solution and Glycolic Acid in the same routine.


Which Deciem products would you recommend for oily and acne-prone skin? We suggest the use of The Ordinary Niacinamide 10% + Zinc 1%. As this is a high-strength vitamin and mineral formula that visibly targets the look of blemishes and signs of congestion. We recommend avoiding unprotected solar exposure, gradually incorporating one new product into your regimen at a time, and applying test patches first to see what works best for your skin. Just as a note – none of our products can be considered medical treatments for acne, so we suggest consulting with your physician to see what may work best for your skin.

I have The Ordinary Hyaluronic Acid, Niacinamide and Buffet+Copper. What order should I apply these? Buffet + Copper Peptides > Hyaluronic Acid > Niacinamide.

Can we use The Ordinary Niacinamide with Alpha Arbutin. Yes, you may! We suggest using the Alpha Arbutin first.

Is The Ordinary Niacinamide ok for sensitive skin? This solution is suitable for all skin types. Apply patch tests prior to a full face application.

Would I apply The Ordinary Niacinamide before or after The Ordinary Buffet.  You may wish to apply The Ordinary Niacinamide 10% + Zinc 1% after The Ordinary “Buffet”.

Can I use The Ordinary Niacinamide after the Glycolic Acid 7% toning solution and before Azelaic Acid Suspension 10%? I’ve been ending my regimen with the Natural Moisturizing Factors + HA. Yes, you may!

Is it possible for Niacinamide to lighten pigmentation from acne scars? Niacinamide has some brightening properties which may help with hyperpigmentation.

More FAQs

Is there anything we should avoid layering this with? Please note that Niacinamide cannot be used alongside L-Ascorbic Acid and Ethylated Ascorbic Acid as Niacinamide can affect the integrity of these forms of Vitamin C.

Would I use the Niacinamide serum before 100% organic cold-pressed rosehip seed oil? You can apply The Ordinary Niacinamide 10% + Zinc 1% first then The Ordinary 100% Organic Cold-Pressed Rose Hip Seed Oil with no conflicts!

Is this the best vitamin B product you have to complement a skincare routine with vitamin A and C use? I’m using Retin-A and a vitamin C serum. It is difficult for us to comment on the pairing of our products with those of other brands and/or prescription medications. We recommend consulting with your doctor/dermatologist, gradually incorporating one new product into your regimen at a time, and applying test patches first to see what works best for your skin. Niacinamide should not be used with pure forms of Vitamin C.

Can Niacinamide be combined with Vitamin C in the morning and glycolic acid or retinoids in the evening? Niacinamide is safe to use alongside Glycolic Acid and/or Retinoids but it should only be used with Vitamin C derivatives.

Can I use The Ordinary Mandelic Acid with Niacinamide? Niacinamide may be used with Mandelic Acid

Final Thoughts

80% of the Deciem Addicts will be repurchasing Niacinamide.

The Ordinary´s Niacinamide was voted the best product out of all The Ordinary products in the Facebook Group and it´s The Ordinary´s bestselling product according to Nicola Kilner CEO of Deciem. 84% of the Deciem Addicts love it. 78% of the Deciem Addicts say it has improved their skin and 80% will be repurchasing it.

Deciem Niacinamide Products