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.
A: We recommend using both products morning and evening. After cleansing and toning your skin, apply Serum-C and allow to penetrate, then follow with C-Strength. During the day, apply either pHaze 6+ Hydrator Plus or pHaze 7 Protecting Hydrator which protect against UVA and UVB damage.