Sorry Chris I totally disagree with the large majority of your post (with the exception of the sugar statement). I guarantee you are not getting all the nutrients from your food. This would be true if all our food weren’t genetically modified and stuffed with preservatives. Most people do not eat to fuel their body. I question everyone’s diet that says they have a good diet.
Just "getting outdoors" is not enough intake of Vit D for an athlete who constantly leaves their body depleted. Careful with Vit C? I take between 10,000-12,000mg a day as I train my ass off and my body needs it. Most people have no clue what they are putting in their body or what their body requires to stay functioning at a high level. I eat a natural and organic diet, every meal is planned out and I still need supplements in order to stay on the mat. If I continued with my previously thought "good diet" its wouldn't be on the mat 1/2 as much as I am today. I'd wager my old "good diet" was better than most's current "good diet". Don't limit your knowledge by not asking questions.
Paul you're on the right track. Also consider the quality of the brands you are using. Some supplement companies use alot of fillers than can negate the effects of the actual supplement. I highly recommend an organic diet along with organic and herbal supplements that are body was designed to digest.
Paul if you have specific questions I suggest going to my wife's facebook page:
http://www.facebook.com/?ref=home#!/BalanceByNature
She is a certified herbalist and natural health professional and could guide you in the right direction. Without her guidance it'd be sitting on the sidelines far more often than being on the mat.