Calories In Calories Out is Broscience, Bro

This week, Instagram reels delivers some more fitness b.s.from someone who should DEFINITELY know the first law of thermodynamics, the.keto.pharmacist! In a hot take unlike anything I’ve seen before, she claims that calories in calories out is just broscience. Let’s break down exactly how we know it is a fundamental truth of metabolism thanks to some old dudes who put a guinea pig in a cryotherapy chamber.