I urge everyone to bookmark that blog; it is always a fascinating tour of the weirder and wonderfuller places on our planet. And let me leave you with this simply jaw-dropping video of undulatus asperatus in action.
(A sunscreen with a physical block like titanium dioxide or zinc oxide can be applied last, after a serum or moisturizer.) Apply a serum next and, finally, moisturizer if you need it. Polis also recommends serums or sunscreens with moisturizers built in because they save time.
Therefore, Dr. Charles recommends using them in conjunction with heavier moisturizers. It is not necessary to have a serum in your skincare regimen. Serums are simply an added step for those that have the right skin type and are looking to go the extra mile in their daily routines, explains Dr. Charles.