Whey protein is a very popular supplement today, especially among sports lovers, bodybuilders and fitness enthusiasts. It is known to help with muscle growth and rebuilding and is considered safe and effective for replenishing protein deficiencies. But some people wonder if whey protein can have a negative impact on liver health, especially in terms of the possibility of liver enlargement.

Whey protein is a byproduct of milk that is formed in the cheese-making process. It is a high-quality protein that contains essential amino acids that aid in muscle repair and growth. It is digested quickly, so it is often taken after a workout. In general, it is considered safe if taken in the right amounts. However, some people may be concerned about its effects when consuming large amounts or with pre-existing liver diseases.

Can whey protein affect the liver?

Current research does not prove that there is a direct link between whey protein intake and liver enlargement in healthy individuals. According to a study published in 2024, high intake of whey protein does not have any adverse effects on the liver of healthy individuals. However, individuals who already have liver problems, such as cirrhosis or non-alcoholic fatty liver disease (NAFLD), should consult a doctor before consuming whey protein.

Liver enlargement and high protein intake

The main cause of liver enlargement can be not just whey protein, but excessive protein intake as well. The liver plays an important role in protein metabolism and when the body is given more protein than it needs, the pressure on the liver can increase. Abusing high protein supplements for a long time can cause problems like increased liver enzymes, but this is very rare and is associated with excessive intake.