Immunocal can be purchased in bulk if you sign up as a wholesale consultant. Immunocal is a protein supplement that provides roughly 90 percent protein by weight. Whether you're a weightlifter looking to build muscle, or a vegetarian that needs to get protein from another source, Immunocal is a viable supplement. If you like it, and you feel that you want to take it for the long term, you'd be best advised to buy it in bulk.