Vit-C X Niacinamide

You can use it if there's no irritation occur. But I will suggest you to use vitamin c in the morning because it can boost protection ( + sunscreen ) from uv rays and niacinamide in the night.

You certainly can…here’s why… https://www.instagram.com/p/CIaWh6ZBzPv/?utm_medium=copy_link

Yes you can use together, but more safe if you test patch

It is ok to use vitamin C and Niacinamide together even when one of the products already contains niacinamide. 🙂 If you overuse niacinamide, you might experience some irritation. Otherwise, it's safe together.

yes of course! apply niacinamide in the morning is great as it can aid with excessive sebum production and vitamin c can fight free radicals! Both of them are a great combo!