would not exceed three squirts for face and chin... 1-2 should be fine
it may actually restore some skin integrety and will help to prevent skin cancer (the DF version only).. there are several studies that show reversal of sun related skin "damage" (in this case melanomas) through the use of topical caffeine (in DF) or topical ECGC (a green tea extract).. likely due to effects of C'amp increase on "skin repair"..