Centrum has folic acid in it - 400mcg

i let my husband take 800mg folic acid in the morning with B1 and B12

and then Jarrow B-Right in the afternoon which also has 400mcg in it. is it okay if he takes 1600mcg of folic acid per day?

this is the type of fish oil that we have at home:
http://www.carlsonlabs.com/p-236-ver...ge-flavor.aspx

would it be okay if takes this 3x per day at 1tsp per serving?

i am concerned about the timing of his supplements.