
A study published in the International Journal of Obesity showed that protein shakes can safely produce significant and sustainable weight loss and improve weight related risk factors of disease, and a related study found that women who increased their intake of whey protein lost twice (2X) as much visceral fat than women who skipped whey protein (25,26). *
There are two conditions that greatly contribute to cardiovascular disease being the leading cause of death in the US – high blood pressure and elevated LDL. Research indicates that the peptides found in whey protein improve both of these factors. The blood pressure is modulated due to the opioid-like activity of several whey peptides—including alpha-lactalbumin and beta-lactoglobulin (17,18,19). And unlike casein protein, which can raise cholesterol, whey protein has the opposite effect lowering LDL cholesterol through a decrease of VLDL (very low-density cholesterol) – the type of cholesterol that modern science is now linking to cardiovascular disease. *
Whey protein is an excellent source of branched chain amino acids, which play an essential role in supporting lean muscle mass, especially as we age. In one trial a diet high in leucine, which is abundant in whey protein, allowed dieters of all ages to lose nearly 7 pounds more weight, while sparing lean muscle tissue, than individuals following a high carbohydrate, equivalent calorie diet (35). *
Levels of serotonin, aka the happy hormone, decrease as we age often-causing depression. Increasing the levels of tryptophan, an essential amino acid precursor to serotonin abundant in whey, has been found to relieve depression and stress (27). Researchers in the Netherlands put 58 subjects through stressful tests and found that those who consumed whey protein experienced fewer symptoms of depression and seemed in a better mood than those who did not (28). *
Researchers found that adding whey protein supplementation to the daily diet boosts metabolic rate and improves glucose tolerance and insulin sensitivity when compared to an equal calorie diet without the added whey protein. Additionally, human subjects given 5 or 30 grams of whey protein significantly reduced blood glucose levels even in subjects with the most severe insulin resistance – without affecting the rate of insulin secretion (31,32). *
Decreased antioxidant levels are associated with IBD (inflammatory bowel disease). The glutathione in whey works as a super antioxidant protecting the tissue from inflammatory damage (9,10,16). Researchers believe that the whey component alpha-lactalbumin may help prevent gastric injury, ulcers, and other gastrointestinal pathologies, even those caused by alcohol and stress—avoiding the need for potentially harmful anti-ulcer drugs (16). *
Consuming protein provides your body with amino acids, which are used to make the neurotransmitters in the brain that help your brain communicate and send out signals to your body. They are essential to brain health. Additionally, drinking whey protein is the best way to increase glutathione levels, which has been shown in studies to protect against age-related cognitive disorders, including Alzheimer’s and dementia (28,29,30). *
In 2013, scientists concluded that whey could be used as a therapeutic treatment for obesity. They found that whey protein caused the release of bioactive peptides and amino acids during digestion that enhance the release of several hormones leading to reduced food intake and increased satiety (33). Additionally, Australian researchers found that a whey protein shake reduced ghrelin (a hormone that tells your brain you’re hungry) more than any other beverage, keeping hunger at bay for up to 4 hours (34). *
Due to the high levels of cysteine and gamma-glutamylcysteine –used to synthesize glutathione- whey protein has the unique ability to detoxify carcinogens and ensure a strong healthy immune system (13). Also, the lactoferrin in whey has been shown to reduce the formation of free-radicals, preventing cell damage and stopping cancer from taking hold. *