The reason that your chicken breast weighs less after baking is because of water loss, for the most part. When it's done cooking, it's denser. Ever made a hamburger patty, and it was nice and plump and big, then you cooked it and suddenly it's a small saucer? Same deal--fat and water drained out.
So, when you've got a 3 ounce COOKED piece of chicken, it was probably 4 ounces raw (I'm throwing out general numbers). So your 3 ounces RAW is going to cook down to be maybe 2 ounces cooked. That's where the calorie discrepancy you're seeing comes from.
I hope that helped?
|