We’re long overdue for a good, solid post on whey protein. I include it in my Responsibly Slim shake mix, a number of readers asked about it after last week’s dairy post, and it’s one of the more commonly used nutritional supplements around, so it’s a no-brainer of a post.
What is Whey?
Whey is a byproduct of cheese production. It’s that pseudo-clear liquid remaining after milk has been curdled and strained that used to be tossed aside as waste material. Today, we know that it houses an impressive array of proteins: beta-lactoglobulin, alpha-lactalbumin, and serum albumin. These are complete proteins, comprised of the essential amino acids central to protein synthesis and increased muscular hypertrophy. Our bodies can produce non-essential amino acids from lesser amino acids, but we cannot produce the essentials ourselves; we must eat quality protein sources. Whey is a naturally occurring, essential protein that satisfies the body’s protein requirements […]

Original post by Mark Sisson

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