If you could only eat yourself, how long could you survive?

Not very long, you would lose mais energy trying to survive dismembering yourself than what you could ever hope to gain from eating yourself.

why would i do that?
i will only cause myself pain and bleed to death
so i'll just starve to death ,well i am dead both ways.so..fuck

Id like to mention that when you starve you are basically eating yourself regardless.

Refer to Kragfan's reply

54 years

OOOH MAN THATS A TOUGH 1, I REALLY DON'T KNOW.

Hmmm if there is water then I can pretty sure survive for a long time.