doubleofive said:
Soylent isn't a mixture of OTC vitamin mixtures. It's a custom blend. Ars Technica did a series on it:
http://arstechnica.com/series/ars-does-soylent/
That was the beta version, v1.0 actually addresses the chalky and such. I think it's an interesting concept.
IMO it's more useful for starving people than SiValley hipsters.