(I know the name is a movie reference. Still doesn't make sense to me.)
It should, since you recognize the reference, and the name fits perfectly. For me, Soylent Green pretty much the first thing that comes to mind when thinking about this type of product.
So right now many, myself included, advocate minimizing soy. You can't get away from it. Thanks to several US administrations soy is huge business. Just watch it. It might be that its good for you. Right now the soy debate is much like the egg debate of the 80s. I leave you with Lewis Black's commentary on food nutrition: https://www.youtube.com/watch?v=tXS5GBuk-GQ
1 - http://blog.zocdoc.com/does-soy-feminize-men-fact-vs-myth/ 2 - http://wwf.panda.org/what_we_do/footprint/agriculture/soy/im... 3 - http://en.wikipedia.org/wiki/Soybean#Nutrition
I can see that there might be soy from the processing plant, but I can't find that information easily on their site.
Soy or soybeans are not an ingredient in Soylent. It has the "Contains: Soy" allergen label because it contains a small amount of soy lecithin, which is derived from soybean oil. Soylent contains lots of oils/fats, and you mix it with water to drink it. Oil and water don't normally mix well. Soy lecithin is an emulsifier that lets them mix without clumping.
My wife is into clean eating. So we limit soy as part of this trend. However, I'm really lazy about eating (1 meal a day when left alone). So Soylent looked promising in that regard.