I have become fascinated with this guy, Molyneux, and have been reading and listening to his podcasts this past week. And... he has mentioned in a few places that he believes that eating fat is the cause of obesity in older adults. I think he recently said that he stopped eating meat, and I've heard him joke about those diets where you 'Eat Fat! Lose Weight!'
The Truth, when I discovered it, changed my life.
When people get older, their metabolism doesn't 'slow down' as so many people believe. They lose the ability to process insulin, and they develop insulin resistance. People don't really know why this happens, but the body responds to this inability to process insulin, by secreting more insulin.
http://en.wikipedia.org/wiki/Insulin
Insulin causes the body to store glucose in the blood, as fat in the body. Insulin is secreted in response to elevated blood sugar levels. Elevated blood sugar levels occur when people eat carbohydrates.
So, if someone forgoes the eating of fat, and replaces that energy souce with carbohydrates, his insulin levels go up, and he gains weight. Moreover, the higher insulin levels prevent the glucose from being burned as energy, and the person's cells will stay deprived of energy even though their blood sugar levels are elevated. Thus, the person may stay hungry even though he just ate. This cycle of eating carbohydrates, elevating blood sugar, elevating insulin, staying hungry and eating some more, is the first stage in a cycle which leads to obesity, diabetes, and all the negative things that go along with this process.
So, to lose weight, lower the intake of food which raises blood sugar. This is primarily sugar and grains. Replace this energy source with fat and you will lose weight. Your body will learn to burn fat. Your blood sugar level will stay low. Your insulin level will come down. Your body will be able to use the energy in the blood, and your hunger levels will fall.
A few years ago I weighed 280 lbs. Two years ago, I stopped eating sugars and starches. Today I weigh 175, which was my high school weight, and all my health markers are excellent. My meals consist primarily of meat and vegetables, but no sugar, grain, or high-carbohydrate vegetables like potatoes.
This is the Atkins diet, and has been criticized sharply. However, about three years ago, people began studying this diet in clinical trials, and now a new study comes out about every week or so. WITHOUT EXCEPTION, every study shows improved health markers across the board. Triglycerides come down, HDL goes up. LDL particle size becomes larger. C-Reactive Protein drops. LipoProtein(A) drops. Bood Pressure drops. HbA1c drops. Blood sugar drops, and WEIGHT drops.
This is causing a sort of conundrum in the field of nutrition because all of the epidemiological studies in the past, draw correlations between the amount of fat people eat, and many negative health markers such as weight and cardiovascular disease - where all clinical trials where carbohydrates are restricted, show improvements in all health markers.
This researcher, who is a vegan, did a two year study.
http://www.youtube.com/watch?v=eREuZEdMAVo
Go to minute 23 for the presentation on health markers.
For an excellent look into the science behind it, take a look at Good Calories, Bad Calories by Gary Taubes.
http://www.amazon.com/Good-Calories-Bad-Controversial-Science/dp/1400033462/ref=sr_1_1?ie=UTF8&s=books&qid=1282741044&sr=8-1