Can I use this as a primer under makeup?

Yes, and it performs well in that role. The creamy texture absorbs fully into the skin and leaves a smooth, even surface that helps makeup apply more evenly and wear longer throughout the day. Allow it to absorb for one to two minutes before applying sunscreen or foundation. Many users find it reduces or eliminates the need for a separate primer, and some longtime customers have reported skipping foundation altogether after consistent use. Apply it as the final step in your morning skincare routine, after any serums and before sunscreen.