Fat causes overweight and the diseases that go along with overweight. Nutrition science has never wavered on that. Fat goes to the lymph and the excess is dumped into the bloodstream, making the blood obviously cloudy and with fat separating to the top, which you can see if you ever see people get blood drawn after a heavy meal. Then the fat is taken up by fat cells. That&#x27;s where the body load of fat comes from. That&#x27;s science. They&#x27;ve measured that the sorts of fat stored are the same fatty acids as the fat eaten. It works the same in all animals. That&#x27;s part of agricultural science too, not just human nutritional science.<p>The current majority of people who believe that high fat diets are good for something other than getting fat and that carbohydrates cause obesity is no more a sign of a change in science than any popular political or religious belief.<p>It&#x27;s a very popular conspiracy theory that nutritional scientists and doctors who follow them are part of or corrupted by the powerful vegan lobby, while the meat and dairy and processed added-oil food and fast food industries have the ideal products for making you thin, as long as you skip the traditional starches in those products, because everyone knows that the all the world&#x27;s old cultures that lived on potatoes or rice or corn or wheat were full of massively obese people, and it&#x27;s not until they got modern food industry amounts of butter, manufactured oil, and soybean-fed chicken that they became the crowds of dangerously thin looking people that you see in old pictures.<p>(I&#x27;m going to get downvoted into invisibility for being right, but people&#x27;s health is at stake, so I&#x27;m going to reply anyway.)