BFB, on 15 March 2012 - 12:56 PM, said:
This is absolutely true. Its all to do with our blod.
CO2 makes our blod more acidic and the pH level in our blood decreases.
And lower pH level in blood would effect our nerve cells in our brain. Which decides our metabolism and how hungry we are.
The blood's normal pH is supposed to stay between 7.35 and 7.45.
CO2 is indeed one of the major player in blood pH imbalance.
But now saying it makes us fat? I don't think so in a direct way.
From what I've read, it could very well influence the metabolism and hormones such as orexins in the brain that influence energy expenditure and food intake.
So it could make you more hungry perhaps but it's of your responsability to control your food intake if you don't want to get portly.
All that, as far as I've read, is still theorical. And since I'm no doctor, biologist, neuroscientist etc. I can't say if anything of this is really valid or true.