Interesting discussion. I was just considering the same issue, since I've just hit leaner times.

Supplements are one of those things that are tough to judge because you don't necessarily see immediate affects or results, either from taking them or suddenly stopping. Unless you're psychic, you'll never know whether or not they've actually prevented a health disaster.

I consider the expense to be like insurance. You could put a lot of money into an insurance policy and never need it. But I consider it money well wasted.

I take a multi, cal/mag, and Udo's Choice oil for omega-3s. I also have some I take irregularly, like vitamin C.