I'd worry about the consequences of an enzyme inhibitor being digested. I mean they're saying that it's so close to alpha-amylase that's present in our mouth and pancreas. However, they don't mention its effects on beta-amylase that is known to be present in bacteria in animals digestive tracts, but we don't know how necessary beta-amylase is to our digestion.

I doubt we'll even see the inhibitor in anything for at least a decade after it's found due to its profound implications. I'm not worried about it one day causing cancer, I'm worried about it causing people to die of starvation or something bizarre after using the inhibitor.