Soy vs. Whey: Protein Quality Matters, Especially to Your Thyroid and Muscles

Quality of protein is a hot topic of debate; whether you consume soy or whey protein makes a considerable difference in your health.

In the past, the idea of quality protein has been attributed to whether or not a protein source provided all eight essential amino acids, which you must get from your diet. Whey protein (a by-product of cheese production), casein (the most common dairy protein, but not found in whey), and soy protein are all examples of complete proteins. According to 20th century theory, these should all be high quality proteins. This idea has enabled the purveyors of cheap soy products to flourish in America.  (more…)