Horcruxes preserve the soul. Does their use affect the natural breakdown process of the human body's aging? Or is it completely spiritual, in the sense, regarding the soul?
Are there any references to Voldemort or any other horcrux user, canon or non-canon, using magic to keep their physical body from decomposing naturally? (Like, degenarative brain disease. Do horcruxes prevent that?)
This question is more along the lines of whether Voldy did any magic to maintain his body. The use of a horcrux is to store the soul. The only physical effect it seems to have had is that it twisted the features.