Spoiler: It's the same as any other niacinamide powder.

Normally we don't allow discussions about mixing commercial products, but 100% niacinamide powder is essentially an ingredient and this product seems likely to generate some questions and confusion. Here's the product page.

Please ask questions in this thread instead of creating a new post!

---

Deciem is advertising this for immediate use. This means you palm-mix it right before applying, in another serum that's between 5.1-7.0 pH.

To make this mixture last longer, you MUST use a preservative and follow guidelines for safe cosmetic formulations. This is not a magic powder that you can add to anything -- it's really just a raw ingredient! See the wiki for a starting place for learning how to formulate. There is also a niacinamide flair you can search for to see what others in this subreddit have created with niacinamide.

Here's a summary of some beginner Q's/mistakes:

• Can I avoid a preservative if I... [preservative guide here]
  • store it in the fridge? No
  • freeze it? Maybe, but stability of frozen products can be iffy.
  • use essential oils or vitamin E? No, these are not preservatives.
  • use it right away (within minutes)? Yes
• Can you formulate a serum for me?
  • No, but we'd be happy to give feedback on any formulations you attempt yourself!
• Do I really need to test pH?
  • Yes, since this is a pH sensitive ingredient. [pH guide here]
• Why can't I mix this with another serum w/o a preservative?
  • Preservatives are effective when they make up a certain % of the final formula. Since commercially formulated products already have preservatives in them, when you add more things, you reduce the % of preservative that is in the final mixture.
• Can I mix this with another serum and THEN add a preservative?
  • I'm curious what others have to say about this, but I would generally avoid this. You cannot be sure about the stability or preservation of the product when mixing commercial products.