I need to do the research on vitamins and their pro's and con's. The most common con seems to be that they go right through you. But then why do I feel better when I take them?
Could be psychosomatic. Or some of the minerals in the common multivitamin may have beneficial effects.
The consensus on the internet appears to be that you should get your vitamins from good food and not a pill. But no diet is perfect. So why not supplement?
This needs a more in depth research but I'm buried in projects right now.