Whey protein is a protein derived from cow's milk. Whey protein can be taken in powder, liquid or pill form and is easily digested by the body. Whey protein is used by athletes and body builders to help build lean muscle mass. While whey protein is beneficial to the body, there are also side effects that can occur with the use of whey protein.
Whey protein concentrate is made from milk and contains up to 6-percent lactose. People who are lactose intolerant or suffer from allergies to dairy products cannot use whey protein concentrate. Whey protein is also available in an isolate, which contains only 1-percent lactose.
Bloating occurs from excess protein in the stomach. When excess protein is not processed properly in the stomach it turns to gas and causes bloating.
Osteoporosis is a disease where mineral bone density is decreased. Excess use of whey protein has been found to lead to osteoporosis in the joints.
The kidneys filter the body's fluids. Long-term and excessive use of whey protein can lead to the increased deterioration of the kidneys.
The liver helps the body synthesize proteins and plays a major role in metabolism. Excessive use of whey protein increases the amounts of protein the liver must process, leading to liver damage.