Well that's interesting, I presumed the so called biodegradability of PLA was more of a joke since you need to compost it, but the body is fairly warm I suppose

Well that's interesting, I presumed the so called biodegradability of PLA was more of a joke since you need to compost it, but the body is fairly warm I suppose. Regardless the problem is not the plastic itself, but the plasticizers and other additives that leech out once you decompose it from what I understand. For medical use I would expect it's fairly stringent on what goes into it, but for something like tea bags I'm less sure.