Unless your friends suffers from extreme malabsorption (which would manifest in serious and constant digestive distress), that is just obviously wrong. If the e

Unless your friends suffers from extreme malabsorption (which would manifest in serious and constant digestive distress), that is just obviously wrong. If the energy is not leaving his body, it has to be either stored or burned up. And you can't burn 4000 kcals on a small frame, he'd be hot to the touch. People taking DNP [0] to lose weight boost their metabolism by way less than that, and that already leads to serious side effects 0: https://en.wikipedia.org/wiki/2,4-Dinitrophenol https://en.wikipedia.org/wiki/2,4-Dinitrophenol