Lipitor, which is also known as atorvastatin, is a medication used to lower cholesterol levels in the body. There is no direct evidence that suggests Lipitor affects protein absorption in the body. However, some studies have shown that statins, including Lipitor, may have an impact on muscle protein metabolism [3]. This means that it could affect the breakdown and synthesis of muscle proteins.

It is important to note that the studies conducted on this topic have been limited and inconclusive. Therefore, it is recommended to consult with a healthcare professional before taking Lipitor or any other medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/books/NBK430779/
[3] https://pubmed.ncbi.nlm.nih.gov/14531725/