You should be OK with that amount. Our bodies have been abused. It will take a while to fill the gaps back in. I would recommend taking them twice a day. Even if they are half doses. Because many are water soluble, if taken twice per day you get a steady release.
Just to let you know what I do, I take a Multi-vitamin (maximum formula) and a super B complex? Just a suggestion. I dont know if its too much, but, I talked to a pharmacist and she said it would be fine to take an extra supplement of B vitamins... Good Luck!