if vitamin pills worked as a means of delivery then we’d now be in a position to bypass the perceived hassle of preparing fresh food for consumption and swallow a few brightly covered pills instead
They do work in general, so I’ve read. And the warnings are all about getting too much of a particular vitamin, so that would imply that they do actually get into your blood. Some don’t work well in isolation though, there are many examples of certain nutrients only being absorbed and working in conjunction with others – read an article about that a while ago, may have been New Scientist. That’s why they always recommend taking them with a meal.
In theory you could replace food with pills, but the range of nutrients is absolutely huge and hard to replicate. Multivitamins don’t pretend to replace food of course, I imagine they’d be somewhat different if they did. Plus the market for food replacement paste would be fairly small, as we’d get fed up with eating it!
Incidentally, preparations must exist to replace food entirely, because they feed coma patients on it, and babies too.
How’s the idea of 5-a-day a myth?