Food Myths You Probably Shouldn't Believe

So when you were younger, you may have believed that runner beans made you run faster, that you had to watch out for 'cereal' killers during breakfast, and that swallowing orange pips would make an orange tree grow out of your head.

Hopefully by adult life you simply look back at myths like these and laugh at the memory of thinking how true they were. But it makes you wonder whether certain 'rules' you have about food now actually stem from myths you probably shouldn't believe...

Here are some of mine:

Never drink a hot drink straight after a cold drink (and vice versa).
I was finishing off a Maccy D's drink on the way to my aunt's house with my family. When we arrived, she made us all a cup of tea. I drank the tea, went to the toilet and promptly threw up - I was young so it's possible that's it not quite what happened, but because that's my memory of the story, I have avoided mixing hot and cold drinks ever since, for fear of it upsetting my stomach!

Don't eat fruit after dinner.
I still believe there is some truth in this - fruit doesn't take as long to digest so if you eat it straight after a big meal, it just 'sits' on top of it and messes up the digestion process.

Cutting vegetables really small before cooking them gets rid of their nutrients.
My thinking behind this is probably that because there is less mass with vegetables that are cut into tiny bits, their nutrients burn off quicker when you cook them. I still reckon this is true.

Fat free or low fat means healthy.
It's shameful but I've only realised over the last few months that this really isn't true. Because fat free foods often contain alot of sugar. And that really isn't healthy!

Brown sugar is better than white sugar.
Good brown pasta, bad white pasta. Good brown rice, bad white rice. But brown sugar is essentially 'coloured' white sugar (molasses are added to make it brown) and although has some useful minerals, you'd probably need to eat a ton of it for it to do you any good. But the mentality of 'brown=good' and 'white=bad' is hard to shake off. (And brown rice is difficult to make!)

Food with less than 5g of fat and less than 10g of sugar per 100g = a healthier choice.
This is what is ingrained in my mind following random stuff I've read about fat and sugar content in the past but can't quite remember. So I know I'm vaguely in the right area, but should probably in fact be looking for lower figures than this. And I always forget that I need to consider the actual portion size too.

Are there any random myths you have about food that you know you probably shouldn't believe?