Brewer's yeast is also called nutritional yeast (the inactive form of yeast) and is chock-full of vitamins and minerals. I had never looked at the nutrition information on Brewer's Yeast, so I was very impressed when I did so the other day and found that it contains a longer list than I care to type here, including amino acids, protein, and the B-complex vitamins. According to the information I found online, many vegans and vegetarians sprinkle it on their food to help them eat a balanced diet.
So you might try it, if you need a boost too. It's certainly worth a try!