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.
Sample/Specimen Considerations: Serum: Serum gel-barrier tube. Plasma: Green top tube, immediately place do not open tape over the top. Centrifuge and refrigerate as is. Place a piece of tape over the top of tube and write Do not open..