Note to the prehistoric party planner: One dead mammoth can feed 25 hungry Neanderthals for a month, but cannibalizing a human would provide the crowd with only a third of a day’s calories.

Essentially, you’re a walking lunch. A new look at the nutritional value of human flesh shows that, compared with other Paleolithic prey animals, humans weren’t especially packed with calories for their size.

“When you compare us to other animals, we’re not very nutritional at all,” says study author James Cole of the University of Brighton, who published his work Thursday in Scientific Reports.

According to his estimates, boars and beavers pack about 1,800 calories into each pound of muscle compared with a measly 650 calories from a modern human.