system
Given the following post, respond as if you're commenting on Reddit:
human
[FMA] Could someone create organic limbs with alchemy to replace Ed's prosthetics?

Roy created a whole artificial body, at one point, and we know that the physical altering of human bodies is possible. Is there any method of creating and attaching an arm to Ed?
gpt
The only successful (non-chimera) limb transplant we know of is Scar's, and that was done by the single best alkahestry expert in Amestris. The donor and recipient were also brothers, so there was naturally no organ rejection. In Xing he might have been able to find someone to do it, since Xing is known for having superior medical alchemy.

However, to pull it off successfully, you're probably going to need a live donor. Ed would rather have automail than force someone to go through that. Yeah, he could do the whole "make a corpse from pig meat" thing that Roy did, but even with the best alkahestry that would probably result in an inferior arm.

Obviously you could do this in a heartbeat with no loss of quality by using a philosopher's stone. Ed would never do that.