A:  Interesting question, and we can't believe we're saying "interesting" to the simple word "vitamin", given all of the other goodies out there in the supplement industry. But the fact is, vitamins are foundation supplements - like no others. They are essential for health, function and well-being at the very basic levels. Sadly, they are among the supplements considered last. People spend all of their hard-earned money on the "miracle" supplements and "superstar" supplements, thinking those are going to deliver the biggest bang for the buck. However, without the continuous, basic levels of vitamins - both water soluble (need replacing daily) and fat soluble (banked vitamins that accumulate over time) - all of these other functions like contraction, protein synthesis, fat burning, and repair during rest cannot occur! Plain and simple. And the most insidious thing about it all is that it's so subtle, you can't measure it and know it for sure when you aren't supplying enough vitamins. That's because the body is a forgiving vessel. However, you would probably see a lot more out of the supplements you currently take if you were to change all of this and make sure vitamin quality and absorption, as well as the correct amounts needed for maximum exertion, were given. Just our two cents, but we think they're almost THE most important supplement. You can't build a house on air.