Pairing the two ingredients is safe and can make retinol easier to use. Niacinamide helps hydrate the skin, which reduces the risk of irritation caused by retinol. Niacinamide and retinol can be combined in one product or used as separate products.
Here's where things get hairy: Older research has shown that mixing vitamin C—specifically the unstable ascorbic acid—with niacinamide can convert it to the compound niacin, which can cause flushing (think blotchy, inflamed skin).
The truth: You can use vitamin C with retinol and retinoids. Get them as separate products so you can tailor the concentration of each and use them at the right time of day. Although vitamin C can be used day or night, it is ideal for daytime use, while retinol and retinoids should be applied at night.
Now that you know the benefits of each, you're probably asking “can you use niacinamide with vitamin C?” In short, the answer is yes. In fact, the many vitamin C and niacinamide skin benefits complement each other and create a powerful combination that targets fine lines.
When layering these powerful ingredients applying vitamin C first and leaving about 15 minutes in between applying your niacinamide product will give the skin enough time to absorb and remain comfortable before using niacinamide to lock moisture into the skin.
Both vitamin C and niacinamide increase the natural production of ceramides in your skin which helps to strengthen your skin barrier, keep your skin hydrated, and reduce irritation. However, niacinamide is probably the better option for sensitive skin as it's usually gentler than vitamin C.
It's best to apply Vitamin C before Retinol, as Vitamin C has a lower pH than Retinol. Once your skin absorbs the Vitamin C serum, your skin will return to its regular pH levels after 30 minutes or so. (You want your skin to return to its normal pH levels so vitamin C doesn't lower the pH of retinol.)
In short: yes, you can use vitamin C and retinol together; try retinol at night and vitamin C during the day—always with sunscreen.
So, should I use vitamin C or retinol for wrinkles? Well, when it comes right down to it, the choice is really in what you're looking to do for your skin. While vitamin C is incredible for the skin because of its ability to help brighten and improve hyperpigmentation, the best active ingredient for wrinkles is retinol.
Now that we know it's a perfectly safe combination, feel free to mix niacinamide and vitamin C to your heart's content. However, if you still feel nervous about combining the two ingredients on your sensitive skin, you can always use niacinamide in the morning and vitamin C at night, or even alternate days.
To reduce the appearance of wrinkles, fine lines and other signs of aging, vitamin C and retinol are two key ingredients to keep in your arsenal. Vitamin C is known for its brightening benefits, while retinol boosts cell turnover.
Vitamin C serum protects the collagens while the Retinol serum helps in cell turn over thereby creating new collagens. Vitamin C serum fights dry skin, while Retinol serum may dry out your skin upon regular usage. Vitamin C serum is not as effective as the Retinol serum in anti-ageing therapy.
Apply your vitamin C first, since it has the lower pH of the two. Then, wait half an hour before you apply your retinol. Incorporating the waiting period allows your skin's pH to return to normal, so each ingredient can work at its intended pH.
Not all skin care ingredients pair well together. Some combinations can react negatively or lessen the ingredients' benefits. Fortunately, it's safe to mix niacinamide and retinol. In fact, the combination is considered to have numerous benefits.
Niacinamide. If you're looking to replace vitamin C with something milder, niacinamide is an excellent alternative. "Both vitamin C and niacinamide decrease damage from environmental factors, they can improve fine lines and wrinkles, decrease hyperpigmentation, and increase collagen production.
Using niacinamide before retinol works well. So does combining them into one product. A 2016 study found that a product containing retinol, niacinamide, hexylresorcinol, and resveratrol improved fine lines, sallowness, wrinkling, hyperpigmentation, and skin tone.
Use vitamin C for hyperpigmentation caused by melanin and use niacinamide if your skin can't handle vitamin C. Keep in mind this is a very hard and fast rule because they aren't easy to compare without really knowing your skin concerns and skin sensitivity.
Don't Mix: Retinol with vitamin C, benzoyl peroxide, and AHA/BHA acids. AHA and BHA acids are exfoliating, which can dry out skin and cause further irritation if your skincare routine already includes retinol. As for benzoyl peroxide and retinol, they cancel each other out.