Here are three articles worth checking out.
The first is a NY Times article with some very interesting findings about how long you can stop working out and still maintain your fitness. One study followed older elite athletes. Those who continued to workout maintained the metabolic benefits of exercise. Those who stopped and became couch potatoes developed insulin resistance and all the other problems of a sedentary life. Athletes of all ages who were fit could work out just once a week and maintain their strength; younger people could even add some muscle mass. One study of kayakers found taking five weeks off from working out cost 9% of their strength and 11% of aerobic capacity, both a significant decline.
The second one from Scientific American is about the powerful advantages of eating real veggies, instead of downing vitamins and supplements that mimic them. Note the scientists are a little confounded that they think they have identified two compounds that cause healthy results in the human body, but it's clear that nature is more complex science can grasp.
And, finally, check out this article about why coffee is good for you. Many would say this is heresy, but not true. Coffee is rich in antioxidants that are good for you.