This is kind of what I wanted to accomplish by building Eat This Much[1], ideally making eating and staying healthy at the same time less of a chore.

I'm really on board with the idea, but what got me interested was the notion that it would be easy to adjust the formula to my needs, e.g. choose a different ratio of various powders if I want to gain weight, lose weight, or compensate for some genetic difference.

[1] http://www.eatthismuch.com