One problem with his health is that he has significantly adjusted his diet, in addition to switching to organic food. This makes the conclusions about his health very suspect (Especially as Americans eat too much meat and not enough fruits/veggies/grains, IIRC).
It's an interesting idea, but the article doesn't really give any details except that he wakes up earlier, feels like he has more energy (very subjective, as they don't back this up with any facts) and his urine is brighter yellow. I wish this had been a better article, but still a nice find. Perhaps they are saving the details for the book.