This is a good thing! Muscle growth is dependant on the balance between protein synthesis and breakdown18. If the synthesis of new muscle protein is greater than the breakdown of muscle protein, net gains in muscle mass are seen.So with whey protein, it will take only 40 minutes for blood levels of amino acids and protein synthesis to reach a peak, and in about an hour they will come back to normal after a single feeding of protein.5,14 This is amazingly fast in comparison to its counterpart casein, or even whole food.CASEINCasein is considered a "slow" protein. When you consume casein, you will reach a peak in blood amino acids and protein synthesis between 3 to 4 hours.5,12This peak, however, does not even come close to that of whey. On a scale of 1-10 (with 10 being the highest or fastest), whey would be a 10. Casein would come in with a meager rating of 2.But, here is the kicker. That is not a bad thing! This, too, is a good thing. Casein dramatically slows the rate of protein breakdown. Remember, muscle growth is dependant on the balance of protein synthesis and breakdown.
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