Technically, it's sugar and carbs that makes them fat. I eat all meat and have hardly on ounce of fat on me. If fatties ate meat, they'd turn into sagging garbage bags of flabby skin because avoiding carbs causes rapid, fast weight loss. Humans are carnivores, and being fed by corporations like cattle is what's creating these abominations. Populations have survived consuming just meat in the Stone Age. It's why Humans were able to evolve brains large to create fire. Lots of fat fucks don't get enough protein for their brains to even function and it shows. Humans are essentially a largely carnivorous species of primates that evolved in the Savannah. One final adaption increased that Human intellect  was the selective pressures of living in the harsh frosts of Ice Age Europe that increased our cranial capacity even further. Now that I've explained Humans are carnivores, it probably explains why lots of people in the developed world are fat. You see, Humans are not meant to survive entirely on vegetables and fruits. Our diet up until recently was mostly meat with a side of vegetables, and with the introduction of more carbs into our diets, Humans have become fat, feminized, and weak compared to just 50 years ago. When did society have a whole bunch of hamplanets in the past? That was the Western Roman Empire, and we all know what happened to it.