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.
If you use more than one product on your skin, it can get confusing knowing which skin care product goes on first. Generally, after cleansing you should use the following products (if you use them) in the following order: 1  Treatment (ex. serums, Rx products, acne treatments, etc). 2  Moisturizer. 3  Sunscreen.