Dry, rough patches? A hydrating face primer can help smooth skin before foundation. ... So if your foundation is water-based, look for a water-based primer, if it’s oil-based, try a primer oil.

If you have oily skin, avoid heavy or oil-based primer formulations, “as not only can these make the skin appear more oily, but it can also contribute to clogged pores,” explains Dr. Marisa ...

A cosmetic chemist explains the difference between oil- and water-based makeup, including ingredients you should look for, if they can mix, and more. Skip to main content Popsugar ...

Celebrity esthetician Renée Rouleau tells us how to add face oil in our skin care routine, because we could all benefit from it. Plus, we picked14 oil-based products to shop.