Nuhydrate You can apply it on the make-up, and if someone does not use the underlay, it works great even solo, because it has a matte, velvet finish. However, use a moisturizer before. I do not recommend applying under the primer, because it is very likely that it will not work with it and the primer will start to roll. So, either for primer or solo. One needs to quickly look forward with their skin condition and take all decisions to keep it young and fresh with the appearance. https://nuhydrateserumtry.com/