DO NOT mix vitamin C serums that contain L-ascorbic acid with niacinamide(AKA vitamin B3) or retinol (vitamin A). The pH levels of these elements don't ...

Don't forget to apply a moisturizer immediately afterwards to seal in all that hydration. Thankfully, hyaluronic acid works well with pretty much any skin care ...

Most of the skincare experts we spoke with recommend adding a Vitamin C serum to your skincare routine slowly before building up a daily or twice-daily ...

When it comes to combining retinoids and moisturizing ingredients such as hyaluronic acid, it's best to apply the retinoid first. Also, What can you not mix ...