I've been told that a balanced diet is better than taking broadscale supplements, something about the ratios, and the way the body absorbs them, so that one should only take multivitamins if you know that your diet is poor or lacking in certain things. Based on that I try to eat plenty of vegetables and a varied diet, but I supplement with fish or seal oil (I don't like fatty fish that much, and I have a predisposition to heart disease), and calcium supplements since I eat little dairy products. The calcium supplements also have a little vit. D and K that help the uptake, but I don't think I'm getting too much of those anyway.
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett