There are just a few major producers that supply the raw materials to the vast majority of protein companies around the world. (blog.nkdnutrition.com)
The vast majority of your protein should be gotten from whole foods and other protein supplements like whey, pea protein, casein, etc.. (legionathletics.com)
He noted, for example, that organelles import the vast majority of proteins from the host. (scientificamerican.com)