Which whey protein is right for you? With Isagenix, the answer is easy: New Zealand whey. See our “Which Whey Protein is Right for You?” PDF flyer by clicking here or on the image to the left.

If the old saying, “you are what you eat,” is right, you will rethink consuming products from grain-fed cows. A new study shows that cows fed high-grain diets have a higher incidence of metabolic disorders related to the build-up of several toxic and inflammatory compounds as well as changes in amino acid profiles in their digestive fluids compared to cows on low-grain diets. Having these metabolic complications (and the need for antibiotic use) negatively affects the quality of dairy products produced, including the whey protein found in milk.

In the study, cows were fed diets consisting of 0-, 15-, 30-, or 45-percent barley grain. Scientists used a combination of measuring techniques to identify 93 metabolites in digestive fluid samples taken from the cows. What they found was shocking. The cows that were fed the high-grain diets (>30 percent) had significantly increased amounts of toxic and inflammatory compounds in their digestive fluids including:

  • Putrescine—a foul-smelling organic chemical compound that is produced in the breakdown of amino acids in living and dead organisms. It is responsible for the odor produced during flesh decomposition and contributes to “bad breath.” It is toxic in large amounts.
  • Methylamine—organic compound with a strong odor similar to fish that is used to make agricultural chemicals such as herbicides, fungicides, and insecticides.
  • Ethanolamine—a toxic, flammable, corrosive liquid used in the production of detergents, polishes, and pharmaceuticals.

The anatomy of a cow was built to live off a diet of grass and shrubbery. However, due to high market demands, farmers have turned to grains such as corn for feed because of convenience and money. It is a lot more economically sound to confine cows to feedlots and feed them grain, which can be digested faster allowing them to “fatten up” quickly. In the eyes of a businessman, this is advantageous; however, science is showing that high-grain diets promote the development of disease and illness because cows are not built to digest grains.

The several perturbed amino acid profiles in the digestive fluids of cows fed high-grain diets included phenylalanine, ornthithine, lysine, leucine, arginine, valine, and phenylacetylglycine. While microbial protein in the rumen (main digestive organ of cows) is an excellent source of high-quality protein, it is not sufficient enough to meet the requirements for high levels of milk production. If amino acids are disrupted in the rumen, their ability to be absorbed is severely reduced.

Unfortunately, it is not just high-grain diets that are of concern here. Byproduct “feedstuffs” are used as cheap fillers in feed for cows and include poultry feather pellets, animal fat, potato waste, soy cakes, poultry carcass, and meat processing waste.

Dairy cows have been turned into machines with the goal of pumping out large amounts of milk at the expense of their health, and consequently, the quality of dairy products. You can trust that Isagenix is not one to choose convenience over quality. Isagenix uses an undenatured whey protein blend sourced primarily from grass-fed dairy cows raised on the pristine pastures of New Zealand.

Update: Isagenix continues to source our dairy proteins (including whey protein) from New Zealand dairy farmers who raise their cows on pasture and don’t use routine antibiotics or hormones. However, to meet the demands of astounding Isagenix growth, we have also sought other suppliers in Australia and the U.S. who meet the same standards for dairy protein. While not “USDA certified organic” due to supplier limitations, we believe that our dairy protein quality exceeds most organic standards. As with any of our ingredients, our dairy proteins are always rigorously tested for their quality and to be sure they are safe. Rigorous testing is performed for microbial activity, pesticides, herbicides, and heavy metals. Safety and quality are our highest priority. 


Saleem F, Ametaj BN, Bouatra S et al. A metabolomics approach to uncover the effects of grain diets on rumen health in dairy cows. J Dairy Sci 2012.