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.
When using a serum separator tube, follow these instructions: 1  Perform venipuncture as with any other blood collection device. 2  Invert the tube gently no more than eight times. 3  Do not remove the stopper at any time. 4  Perform venipuncture as with any other blood collection device.