Human flesh

Human flesh is, obviously, the flesh of a human.

This food item restores a high amount of HP at the expense of a relatively high radiation count. It can be found on feral ghouls, in possession of the AntAgonizer, on trogs in the Pitt, on swampfolk in Point Lookout, and on abominations in Mothership Zeta.

Fallout: New Vegas
Human Flesh also appears in Fallout: New Vegas, just as in Fallout 3 it appears on dead Ghouls and can also be found on the plates that the fiend Violet's dogs eat from.

In the Old World Blues add on of New Vegas, Human Flesh can be obtaining on the death of certain Y-17 Master trauma harness. This would mean that flesh can be preserved under the Space suit (Fallout: New Vegas) of the creatures.