Lipitor is a medication used to lower cholesterol levels in the body [1]. According to the American Heart Association, there are certain foods and drugs that can interact with Lipitor, which may affect the way it works in the body [2]. However, there is no mention of beef or any other specific food item in the sources provided that can interact with Lipitor.

The University of Rochester Medical Center states that certain foods, such as grapefruit and grapefruit juice, can interact with Lipitor and increase the risk of side effects [3]. This is because grapefruit contains a compound that can interfere with the liver's ability to metabolize Lipitor, leading to higher levels of the drug in the body. However, there is no mention of beef or any other specific food item in the sources provided that can interact with Lipitor in a similar way.

In conclusion, based on the sources provided, there is no evidence to suggest that Lipitor can affect the way the body processes beef or any other specific food item. However, it is important to consult with a healthcare provider or pharmacist about any potential interactions between Lipitor and other medications, supplements, or foods [2].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.heart.org/en/health-topics/consumer-healthcare/medication-information/medication-interactions-food-supplements-and-other-drugs
[3] https://www.urmc.rochester.edu/encyclopedia/content.aspx?contenttypeid=56&contentid=2967