If compare pictures of him in 98 versus 99, you can see the change in is physical shape.
I might be wrong but i heard that at the time of is death he weight 110 lbs
He really was depressed and he most likely didn't care about himself because he was going to die in a few months.
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"I have come here to chew bubblegum and kick ass...and I'm all out of bubblegum."
-Roddy "The Rod" Piper, "They Live" (1988)