Can I use niacinamide with hyaluronic acid and vitamin C?
You can combine niacinamide with all other serums and creams. You can use it with retinol, Hyaluronic acid, Vitamin C, BHAs, or AHAs. Niacinamide and retinol work well together.
Why can't you use vitamin C and niacinamide together?
Several blogs, and even some beauty magazine articles, state that while the two ingredients are great on their own, combining them creates a two-fold problem: One, it neutralizes the effectiveness of both ingredients, and two, it might create a substance (nicotinic acid) that leads to skin redness.
Which goes first niacinamide or vitamin C?
Since vitamin C is notoriously unstable, you always want to apply it on clean, dry skin. Then "Let vitamin C completely dry prior to placing niacinamide," says Lamm. That way, the ascorbic acid has a chance to settle into the skin, and there's a smaller chance of combining the two actives.
Can I use niacinamide after using hyaluronic acid?
If you decide to layer, it's recommended to start with Hyaluronic Acid to hydrate skin cells, and then top it up with Niacinamide to protect the skin's surface and prevent moisture loss.