Originally posted by: dullard
It all really got its start in the early 80s. A bald woman (I wish I remembered her name) was on every talk show, every news show, and almost every infomercial with one catchy phrase: "fat makes you fat". She had no education, so scientific proof, nothing. But it caught on. She argued that you could eat 100 pounds of pasta a day as long as you didn't eat any fat. You could eat tons of breads, grains, fruit, vegetables, etc - 2, 3, 5, 10, 100 times more food than you normally eat and lose weight. Of course it was all just a bogus way to make a buck selling her diet book. But the phrase caught on, "Fat makes you fat". The low fat craze really caught on with the consumers. Low-fat products flooded the market and people ate way more than they used to, because "it is low fat". Fat consumption plummetted. What happened? The less fat people ate, the heavier they got. It is amazing to look at graphs of historical fat consumption and average weight - they go perfectly hand in hand (as one goes up the other goes down). All due to this one bald woman trying to make a buck.
The fact is your body's mass MUST obey the conservation of mass. If you put 5 kg in, and 4 kg comes out (bathroom duties, lost hair, bleeding, exhaled carbon, sweat, etc.) then you gained 1 kg. That is true if you ate 5 kg of fat, 5 kg of carbohydrates, or 5 kg of anything else. Fat DOESN'T make you fat. Eating 2, 3, 5, 10, 100 times more food than you used to makes you fat.
In fact fat makes you feel full so you eat far less food. A little bit of fat 30 minutes before a meal will dramatically cut your consumption during that meal. Avoid all fat and you never get that factor of "fullness". Sure it is just one of a half dozen "fullness" factors, but it is an important one.
There were low-fat diets around before this bald woman hit the scenes. But they never caught on. Not until she came around. We haven't recovered yet.