Western diets are mainly composed of eating muscle - meat proteins instead of connective tissues proteins which are rich in collagen. (shop.furtherfood.com)
If tissue proteins can survive for millions of years, scientists could analyze them to make detailed interpretations of the biology of ancient species and their relationship to those living today. (discovermagazine.com)
When done correctly, nutritional ketosis is achieved while maintaining lean tissue protein and function. (blog.virtahealth.com)