See DrFuhrman’s Vitamin Advisor This is a complex subject and there are many motivations behind why you would would to supplement your nutrient rich diet, or not. I wrote about this some months ago in a blog post, "why could you need to supplement eating a nutrient rich diet?". I also wrote about it in this prior post call "Depleted Soil and the Pitch to Sell Supplements". And the answer is? Well, read those posts and my guess is you're going to come to the conclusion that it depends on your situation. Dr. Fuhrman always views matters on what the science of the situation says, combined with an understanding of human health and performance and common sense. Taking a stance that "you don't need supplements" is an unqualified blanket statement that is likely not serving you. By the same token, over doing supplement based on the latest argument without evidence is not serving you either and it is proven that you can make yourself feel better if you believe that taking something is making you feel better. So this question requires some study on your part, some advice from someone like Dr. Fuhrman and an understanding of your circumstances.
 
See DrFuhrman’s Vitamin Advisor