There is currently no scientific evidence that suggests that whey protein directly causes cancer. In fact, some studies have shown that whey protein may have potential health benefits, including reducing the risk of certain chronic diseases.
However, it's important to keep in mind that some people may have a sensitivity or intolerance to whey protein, which could result in digestive symptoms such as bloating, gas, and abdominal discomfort. Additionally, some individuals with a history of liver or kidney disease may need to limit their intake of whey protein.
It's always a good idea to talk to a doctor or registered dietitian before adding any new supplement to your diet if you have any existing health conditions. They can help determine the right amount and type of protein powder that's right for you.