Nutritional or energy suppliments: Are they any good?

Has anyone tried these or any other supplement for mental and physical exhaustion and how effective are these?

http://www.gnc.com/product/index.jsp?productId=4033441#pr-header-4033441

They shouldn’t have any side effects, has anyone used any of these?

Re: Nutritional or energy suppliments: Are they any good?

They're pretty much multivitamins from what I can tell, and commonly these are believed not to have any side effects. Being allergic to a certain formula or ingredient can have side effects though.

Any specific goals you're looking to achieve?