[lurkerperpetual]

There are plenty of advances to be made for sure, there's not much science for it 'yet'. That is why I mentioned 'healty'. Not some super-food to get you through a short period of intense physical/mental/emotional effort, but something that does not wreck your metabolism and plays well with your organs' age-old habit to be useful and doing their thing. So it would definitely not be just some bunch of nutrients but nanobots too that get cooperate with and monitor your organism. It's probably very hard, but if solved, it would make most (all?) other problems mentioned in this thread be non-issues :)