A new risk revealed Researchers screened 134 products for 130 types of toxins and found that many protein powders contained heavy metals (lead, arsenic, cadmium, and mercury), bisphenol-A (BPA, which is used to make plastic), pesticides, or other contaminants with links to cancer and other health conditions.

Is protein powder actually safe?

Protein powders are generally recognized as safe, although you may experience digestive side effects if you consume large amounts of protein powder. If you're lactose intolerant or otherwise sensitive to lactose, dairy-based protein powder may lead to stomach upset, bloating, and gas.

Why does protein cause cancer?

Why the protein-cancer connection? Protein intake influences the levels of the growth hormone IGF-I, which not only affects the growth of healthy cells, but can also encourage cancer cell growth.

Is whey protein a carcinogen?

Both animal and cell culture studies have proven that the anti-carcinogenic qualities of whey protein are associated with the sulphur amino acid cysteine, a substrate that combines with glutamate to form γ-glutamylcysteine.

Could protein shakes harm your health?

Experts say too much protein can lead to dehydration and digestive problems, increase your risk for osteoporosis, and for some people, cause kidney problems. And now, an investigation appearing in the July issue of Consumer Reports finds that some protein drinks could be toxic, if you take too much.

Is it OK to have protein powder every day?

To be clear, there is no hard-and-fast rule about drinking protein shakes, and having too many of them in one day likely won't have any long-term detrimental effects. For most people, anywhere from one to three protein shakes per day should be plenty to help them meet their nutritional needs.

Does whey protein have negative side effects?

When taken by mouth: Whey protein is likely safe for most adults when taken appropriately. High doses can cause some side effects such as increased bowel movements, acne, nausea, thirst, bloating, reduced appetite, tiredness, and headache.

Is protein good for cancer?

People with cancer often need more protein than usual. After surgery, chemotherapy, or radiation therapy, extra protein is usually needed to heal tissues and help fight infection.