User blog comment:JakePT/New Information from PSM3/@comment-3571466-20110424130129/@comment-2174252-20110424234138

Extracted directly from the mag scans:

…”We see one new type – the Cannibal – that’s part Batarian, part human and part Reaper. Apparently, during combat it eats other species to give it strength”.

I don’t read anywhere specifically mentioned that it eats its own forces. Besides this is only the writer’s version of what he saw or heard in the interview. Again, we are just speculating here and IMHO it doesn’t make sense.