 [ Symptoms ] how is epilepsy treated [ Disease ] i hate to break the news to you but vitamin b will not create extra energy in someone who is not vitamin b deficient like pernicious anemia the body stores very little nutrients from mulitple vitamins and will eliminate them if not needed most vitamins and minerals are obtained from our diet it is okay to take a multi vitamin if your diet is not very good any person who is weak or tired should be carefully examined by their medical provider to find out why just taking vitamins may not solve this problem