In case anyone really needs to be told, don’t do this: http://www.theregister.co.uk/2013/05/21/soylent_food_replacement/
The short version, a geek without any medical or nutritional training decided he didn’t want to have to eat or cook anymore, and so would come up with a food replacement that he’s calling “Soylent”, in a rather tasteless homage to the famous movie.
No-one involved in the company appears to have any training in this area, and Rhineheart has supposedly created his recipe by doing some basic review of the research and then just testing the stuff on himself.
These guys have been covered before on the Skeptics Guide (http://www.theskepticsguide.org) and whilst they don’t appear to be deliberate hoaxers (they seem to believe what they claim), they do seem to be dangerously lacking in sense.
They’ve managed to raise more than 100k on kickstarter so far, which just goes to show that there are plenty of people out there with far too much money, but don’t be fooled.
If you really want a liquid meal replacement – They Already Exist!: http://www.optifast.com.au/