While I think his idea is promising, I'm inclined to agree. Simply something a subtle as pooping less for a year might wreak havoc on the bacteria in the colon.

While I think his idea is promising, I'm inclined to agree. Simply something a subtle as pooping less for a year might wreak havoc on the bacteria in the colon. As far as I know, the precedents for powder-based nutrition are all supplements, and did not displace a regular diet entirely for a significant period of time. I think it's something that should be tested in a scientifically rigorous way. Trying to hack your body like this is bold but if it fails it will fail in a very public way that might tarnish the idea for a long time.