I take a daily multivitamin and a few other suppliments but have heard they really don't do anything for you, is this true and am I just wasting my money?

How much of the vitamin you are taking you actually absorb (if any) depends greatly on the quality of the supplement, and whether it comes from natural sources or are synthetically made, chelated or not chelated etc.. I recommend only chelated and naturally derived supplements. Heres what happens, when you ingest...lets say spinach...the iron molecules in the spinach bind themselves to vegetable fats and other molecules and are therefore more readily absorbed by the body. If you just take an iron pill, it leaves little for the molecules to bind to, so you absorb only a little, the rest is flushed in your urine. What Chelation does, is PRE bind the iron (or other vitamin or mineral) to a molecule your body can easily absorb. Did that make sense?