This is a good talk by professor David M Diamond. Because of health issues of his own he started studying diet and health. Soon he realized that much of what we believe about healthy food today is based on bad science, preconceived notions and economic interests.
I agree with almost everything in the talk, except for one thing.
Cholesterol and eating fat
Diamond claims that eating high fat diets do not raise the cholesterol. For some people there is no change, but on average eating low carb high fat food will increase your cholesterol somewhat. This has been shown clearly in many studies.
However it’s mainly the good cholesterol, the HDL-cholesterol, that increases. And having a lot of HDL-cholesterol means that your risk of heart disease is a lot lower.
The problem with disagreeing too much
I think it’s very important that we do not fall into the trap of disagreeing with every conventional idea (e.g. global warming, vaccines, statins for people with heart disease). The fear of fat has been a mistake, but that obviously doesn’t mean that every conventional idea has been a mistake.
There may be other mistakes too. But even if so it may be wise to focus on one area at a time. Otherwise we make it harder for other people to take us seriously. The most important thing is of course to not contradict conventional ideas when they are correct.
High fat diets raises the cholesterol a little bit on average, high fat diets raises the good cholesterol. And that is a good thing.