Multivitamins no good?

Moby says:"There was a nutritionist in a study I worked in (on Vit A in cancer prevention.)

When I asked her about vitamin/mineral supplements she said the current thinking (this was about 2002) was that it is preferable to get all your nutrition from the food you eat. This is because there are lots of things (she mentioned flavinoids amongst other things I've forgotten) that have been identified as beneficial but not thoroughly researched and whose roles have not yet been identified. Those things are not yet contained in the commercial supplements"

My daughter is a research grad student. She said it is rather difficult to get all the nutritional needs 'recommended' in the average diet. You would have to consume a lot of fresh veggies and fruits, and a lot of calories. Thus, I take a multi vitamin and and omega-3 fish oil. My HDL is fantastic, but I do want to have my d level checked since I am a cancer survivor, and my specialist suggested it.