Testing is needed at the point where risk is. If something comes from a farm and your job is to decontaminate it - there's point in testing output. If you're ru

Testing is needed at the point where risk is. If something comes from a farm and your job is to decontaminate it - there's point in testing output. If you're running a restaurant you probably don't need your dishwasher to test tap water quality and post results on the website. Soylent is simply mixing a number of standard powders, most of those already heavily processed. I think it's quite clear that an ingredient they actually wanted in the formula is causing drama, not that something got contaminated or not up to spec. Testing you suggest would show that "yeah bag contains exactly what we want". But that wouldn't catch the issue of "what we've put in the bag isn't compatible with (some?) human bodies".