Based on the available information, there is no evidence to suggest that Lipitor, a medication used to treat high cholesterol, changes dietary protein absorption.

Lipitor, also known as atorvastatin, is a type of drug called a statin, which works by blocking a substance your body needs to make cholesterol [${3}]. This helps reduce the amount of cholesterol in the blood, which can help prevent heart disease and stroke.

The process of protein absorption in the body is a complex one, involving several different mechanisms and organs, including the stomach, small intestine, and liver [${1}]. The information provided does not mention any effect of Lipitor on protein absorption.

Additionally, a book chapter from the National Center for Biotechnology Information (NCBI) on the "Pharmacology of Lipid-Lowering Drugs" also does not mention any effect of Lipitor on protein absorption [${2}].

It is important to note that while Lipitor can help lower cholesterol levels, it is still recommended to maintain a healthy diet and lifestyle, including regular exercise and a balanced diet, to manage high cholesterol.

Sources:

* <https://www.drugpatentwatch.com/p/tradename/LIPITOR>
* <https://www.ncbi.nlm.nih.gov/books/NBK430779/>
* <https://www.uptodate.com/contents/high-cholesterol-and-lipid-treatment-options-beyond-the-basics/print>