I imagine Kickstarter turned them down because of potential liability if something goes wrong. Replacing food with chemicals makes sense to scientists and engineers, but I imagine this has the potential to be lawsuit-heavy for the average people out there (my back aches, must be the Soylent).
Edit: specifically, these two guidelines:
- Projects cannot offer financial, medical, or health advice.
- No tobacco, drugs, and drug paraphernalia; energy food and drinks; or nutritional supplements.