454g = 1 pound
1g protein = 4kcal
Muscle = 20% protein; 80% water. = less than 365 kcal per pound of
lean muscle mass.
1g fat = 9kcal
Fat = roughly 86% fat, 15% water = 3500+ kcal per pound of
pure fat.
Why is this important? Because if you're losing weight at a rate faster than your caloric deficit of 3500 kcal, you're probably losing muscle, and most likely lots of it!!! CHECK YOUR LEAN BODY MASS REGULARLY.
Exceptions would be carb load days and losing water. Consider this if the scale does something unexpected.
The article I read that breaks this down.Whey protein blends = use as primary protein addition: combination of fast and slow absorption rates
Whey protein isolate = use after workout: very rapid absorption to aid in muscle growth & recovery
Casein protein = use before bed for sustained protein: very slow absorption.