Can niacinamide mixed with ceramide?

Yes, combining niacinamide and ceramides can help soothe sensitive or inflamed skin. The pairing of niacinamide with ceramides can contribute to both immediate, visible results and the long-term visible improvement of skin’s appearance and hydration. Source: https://naturium.com/blogs/ingredient-library-blog/using-niacinamide-and-ceramides-together#:~:text=Yes%2C%20combining%20niacinamide%20and%20ceramides,of%20skin%27s%20appearance%20and%20hydration.

Yes, you can use them together with no issues 👍🏼 Ceramides generally works well with everything (it's naturally found in our skin)

If am using Niacinamide I was told not to mix it with vitamin C and hydroxy acids, but Niacinamide would work well with ceramides to comfort the skin in different ways.So far its been comforting to my skin.

Yes definitely and some formulations have both.

Ceramides are not an active and therefore they play wel with just about everything, it’s usually only if you mix multiple actives like vitamin C and retinol that you will see problems, but many actives also can be mixed, for instance niacinamide and AHA or BHA can play very well together of your skin can handle it, even niacinamide and vitamin c can be used together if you let your vitamin c absorb well first before using niacinamide, hope this helps 💙