Check out this article from Army Times: Army needs volunteers to eat only MREs for 21 days straight
http://www.armytimes.com/story/military/2015/12/30/army-needs-volunteers-eat-only-mres-21-days-straight/78011512/Well, here ya go you MRE lovers. Eat MRE's for 21 days.
Three weeks, nothing but MREs.
It's not a far-flung mission, nor is it a lost wager — it's how Army researchers hope to discover how new knowledge of the digestive process could improve future Meals, Ready-to-Eat. The work could even help protect soldiers from sickness while deployed.