I recently started taking a multi-vit/min -- for the added assurance of getting all the nutrients I need;

calcium chews only for those days I do not eat foods with calcium -- important for maintaining bone health since we lose calcium as we age -- as well as to help the blood pressure stay within normal range;

somedays I take omega-3 fatty acids -- to minimize inflammation and one type of these fats is concentrated in the eye and brain so I wanted to make sure I have enough to support memory and vision -- the other type supports heart health

And some days I take vitamin C to help maintain my immune system during the cold months.

Orchid, I agree that there are quite a bit of herb/drug/nutrient interactions and we must know what we are doing when we take these supplements. I research and write a lot about this area -- one reason is because there is so much misinformation.