The Arizona Republic discusses supplements, one of the thorny topics in healthy life extension. Yes, modest supplementation is definitely good for you - you should be doing it. Beyond that, it becomes quite hard to measure cost versus benefit in the noisy marketplace. Just take a look at the deluge of information at the Life Extension Foundation website, for example. You can spend as much time and money as you care to on supplements, but what exactly does it do for you and your healthy life span on a supplement by supplement basis? Before getting lost in endlessly tinkering with supplement mixes, it's worth remembering that diet and exercise are just as important to overall health and longevity.