system
Given the following post, respond as if you're commenting on Reddit:
human
[fullmetal alchemist and technically fate as well] Could you use alchemy to alter human bodies?

Could you use alchemy on your body to change your appearance to some extent, or manipulate somebody else's body to the point of not being useable?
gpt
For FMA, yes. 

Changing appearances - Envy can shape-shift at will and Roy Mustang has changed the appearance of a corpse to fake Maria Ross' death.

Manipulate someone else's body - Scar does this, but he mostly only used the deconstruction portion to kill people. 

As long as it doesn't involve the manipulation of a soul, altering human bodies is possible without a Philosophers' Stone.