Carbs, protein and fats all work the same way.
Lets say you want to ingest 200 grams of protein. It doesnt matter where the 200 grams come from. If I eat 15 slices of cake to get 200 grams of protein, that is the same as eating 5 chicken breasts to get 200 grams of protein. Your body doesnt know where the protein is coming from.
The same with carbs. If you need to ingest 100 grams of carbs, you can get those carbs from anywhere.
The point being is that as long as you dont go passed what your body needs, you're fine.
/thread
A carb is not a carb.
A calorie is not a calorie.
A calorie breaks down basically into protein, carbs and fat or any combination of these.
Protein breaks down into complete protein sources (which contain all 9 essential amino acids, mostly animal protein),
and incomplete protein sources (which don't contain all 9 essential amino acids, mostly plant protein).
Incomplete protein sources can be combined to form a complete protein source though.
Carbs, as already previously mentioned break down into complex carbs and simple carbs which have completely different effects on the body.
Fat breaks down into saturated fat and unsaturated fat where unsaturated fat, especially poly-unsatured fat (such as high quality vegetable oil) is to prefer.