Astonished that your trainer knows so much about the macronutrient breakdown of the foods you eat? It's probably because we spend a lot of time on sites like this.
The good news is you can look up virtually any food and get a pretty good idea of exactly how many calories you're consuming. The bad news? You can look virtually any food and get good idea of exactly how many calories you're consuming.
Go there if you must (and you must!).
