Because vitamin C is an acid, you shouldn't combine it with other skin-care acids such as alpha-hydroxy acids (AHAs) like salicylic acid, and beta-hydroxy acids (BHAs) like lactic and glycolic acids. “Mixing with other acids at the same time can change the vitamin C's pH and render it useless,” Dr. Chiu says.
Yes! It is completely okay to mix two serums together, or even more. However, there are a couple of guidelines to abide by when mixing. Firstly, you need to mix each serum in the palm of your hand before applying to your face.
AHAs and BHAs, such as glycolic, salicylic, and lactic acids should never be used with Vitamin C. Vitamin C is an acid, too, and is unstable, so the pH balance will be thrown off by layering these ingredients together and might as well be useless.
Vitamin C works best in combination with Vitamin E, Ferulic Acid, Vitamin B, and Hyaluronic Acid. Designed to deliver a high concentration of actives, Vitamin C booster serums are a popular choice in skincare.
Niacinamide With Vitamin C Are a Winning Combination
This means that you're safe to use both niacinamide and vitamin C, either together in the same product, or combined from different products that you layer one over the other.
Can You Use Hyaluronic Acid and Vitamin C Together? Not all powerful skincare ingredients can be mixed, but hyaluronic acid and vitamin C are two that become even stronger when paired with one another. These ingredients can provide both immediate and lasting results when used together in anti-aging formulations.
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.
We all have different skin needs and routines, but as a general rule, we recommend incorporating vitamin C into your skincare regime every—or every other—morning. We specify morning, because the antioxidant helps to protect from things like pollution and UV light, which you're typically exposed to throughout the day.
Can you use BHA and vitamin C together? Yes, you can, but only if you use each ingredient properly in your routine.
Limit to Two Serums Per Routine
We recommend you use no more than two face serums per routine. Again, alternating skin care items is a strategy here. If you have many serums that you like, use one or two in your morning routine and two different serums in the evening.
The reason why people suggest a maximum of two or three serums comes down to layering and penetration. Heaps of brands, salons and experts recommend leaving time between applying your serums and moisturisers, and doing it in a specific order so as to allow all of the ingredients to actually sink into your epidermis.
Use your vitamin C serum first, and let it dry.
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.
Salicylic acid and vitamin C are both effective products on their own but, when combined, they can be even more beneficial. Whether you're looking to brighten your skin, reduce the likelihood of blemishes or just help slow down the skin's natural aging process, these ingredients may be just what you're looking for.
Yes, you can, BUT you will get better results if you use vitamin C and glycolic acid/salicyclic acid separately. We recommend using vitamin C in the morning and your AHA or BHA at night.
Vitamin C can have exfoliating effects on the skin, which is why we generally don't recommend mixing vitamin C with your AHAs and BHAs. As with using AHAs and BHAs together, throwing vitamin C into the mix can be a recipe for irritation.
If you are applying a Vitamin C serum and hyaluronic acid separately, it's suggested that you apply the Vitamin C first, and then add the hyaluronic acid afterward in order to help fortify the skin barrier and lock in the moisture.
Yes, you could use niacinamide in the morning and vitamin C at night. Both ingredients are highly effective and are able to deliver impressive results whenever they are applied to the skin.
Since serums contain the active ingredients that you want to penetrate as deeply as possible into your skin, you should always apply a serum directly to your skin after cleansing or toning and before your moisturizer and sunscreen. Don't put your serum on after you moisturize.
You can mix serums together in the palm of your hand before massaging them into your skin. This works best if all the serums are of the same consistency – otherwise, they won't blend together super smoothly, and you might end up with serums that feel (excuse this word), curdled.
"Because vitamin C serum helps protect your skin from free radicals, most dermatologists have recommended applying it in the morning to prevent damage during the day," says Joshua Zeichner, the director of cosmetic and clinical research at Mount Sinai Hospital in New York City.
Good (Skin) Days C's The Day Serum
Vitamin C moisturizers are also becoming more common, Dr. Lamb says, and you'd want to use those at the end of your skin-care routine. And if you're wondering if you can use vitamin C every day, the answer is yes.
Your skin requires a low pH level (0 to about 3.5)to absorb Vitamin C, while Retinol requires a higher pH level (around 5.5 to 6). When you mix Vitamin C and Retinol, the pH of vitamin C increases and the pH of Retinol decreases — hence why it's believed that the two ingredients render each other ineffective.
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.