Delwin Delwin:
Researchers exist to deceive on behalf of big industry. It's extremely easy for them to turn around years later and explain why their research was flawed, and extremely difficult to prove that they were being intentionally deceptive since they are the "authorities" on the subject they are writing the rules for.
Food studies are often the hardest to do, because to get actual reproducible evidence, you have to feed people a food for years and decades knowing that it may cause harm. Many people don't want to do that. So they rely on anecdotal evidence of what people recall they ate for the last weeks. Usually inaccurate.
That's why the China Study is so important. It used the food people naturally ate by region to determine the consequence of diet on health, without having to force participants to eat something they wouldn't normally.
And now that 50 years of diet data is becoming more relevant now that China is adopting a more western and unhealthy diet. They are already starting to see the effects of burgers, fries and chocolate shakes in increased obesity, heart disease and adult diabetes.