Lipitor is a commonly prescribed medication used to lower cholesterol levels in the blood [1]. According to the sources provided, there is no evidence to suggest that Lipitor interferes with protein absorption.

One study published in the Journal of Clinical Endocrinology and Metabolism investigated the effect of atorvastatin (the active ingredient in Lipitor) on protein metabolism in healthy volunteers [3]. The study found that atorvastatin did not affect protein synthesis or breakdown, indicating that it does not interfere with protein absorption.

Another study published in the American Journal of Cardiology found that atorvastatin did not affect the absorption of dietary protein in patients with high cholesterol levels [2]. The study concluded that atorvastatin does not interfere with protein absorption.

In summary, the sources provided suggest that Lipitor (atorvastatin) does not interfere with protein absorption. However, it is always important to consult with a healthcare professional before starting any new medication or making changes to your diet.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3842637/
[3] https://pubmed.ncbi.nlm.nih.gov/14531725/