I've heard this so many times over the years and while it's beautiful and simple and conceptually right, it's so impractical that it's "wrong". The body digest

I've heard this so many times over the years and while it's beautiful and simple and conceptually right, it's so impractical that it's "wrong". The body digests calories different depending on the source, e.g. eating an orange vs drinking orange juice. Going to the gym for an hour might burn a few hundred calories, which is about a snickers bar. These two combined means that adding the calories of your food vs the calories at the gym is a really bad way to lose weight. Of course, I'm not a doctor and have no sources to back this up, other than reading the China Study 10 years ago. :)