Can insulin produced in lettuce cure type 1 diabetes some day? Possibly. In mice, it seems to modulate the immune attack on the beta cells that is the hallmark of type 1 diabetes. But the pathway is complex.
Therapeutic insulin is usually injected. This is for two reasons. First, most proteins are partically digested in the stomach. The very acid stomach first denatures the proteins. This means that the very specific folding of a protein that gives it specificity is destroyed, and the...

