Even after reading the article, I really don't understand the use case. Aside from biodegradability, but that doesn't necessarily require it to be edible to humans. Robots could just deliver the food without being eaten, and then be reused, which seems way more practical/cost-effective. Similarly for health monitoring stuff, wouldn't it be better if it was designed to be completely inert/durable and then excreted? If anyone understands this better please explain, genuinely baffled