According to Dr Serena Love, a gastro-Egyptologist, it's not proven. "During the pyramid age, so 2,500 BCE, when the pyramids around Giza and that whole complex were being built, what we have is textual sources that says [workers] were given a daily allowance of bread, beer and onions. And when you're talking about 10,000 people that were living there, you are making a lot of bread."
