The thing to remember is that certain compounds, while they contain the supplement in question, are not able to be absorbed by your body. For instance, Tums has a high amount of calcium in the form of calcium carbonate, which is basically concrete. The tablet itself contains a certain amount of calcium, which equates to a percentage of your recommended daily allowance. The problem is that your body only absorbs on average less than 10% of calcium in this form. There are other calcium compounds that are more easily absorbed, however the best way to get the complete vitamin content is from food.<br /><br />That being said, fish oil and flax seed oil are already in food form. I highly recommend either one or both of them. As far as other nutritional supplements go, if you take a b-vitamin, I would suggest the under-the-tongue compound as it is more easily absorbed. for vitamin C, if you can't get it from fruits, Emergen-C is a great way to go. <br /><br />Just my 2 cents.