Lipitor, also known as atorvastatin, is a medication used to treat high cholesterol levels. While there is no direct evidence that Lipitor affects beef digestion, there are some potential interactions between the medication and food that could impact digestion.

According to Drugs.com [3], it is recommended to take Lipitor with or without food, but not to consume grapefruit or grapefruit juice while taking the medication. This is because grapefruit can increase the amount of Lipitor in the bloodstream, potentially leading to an increased risk of side effects.

In terms of the effects of Lipitor on digestion, a study published in the Journal of Lipid Research [2] found that atorvastatin can alter the composition of gut microbiota in mice. While this study was conducted on mice and not humans, it suggests that Lipitor could potentially impact the gut microbiome in humans as well. The gut microbiome plays an important role in digestion and overall health, so any changes to its composition could potentially affect digestion.

Overall, while there is no direct evidence that Lipitor affects beef digestion, there are some potential interactions between the medication and food that could impact digestion. Additionally, a study on mice suggests that Lipitor could potentially impact the gut microbiome, which could in turn affect digestion.

Sources:
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4918082/
[3] https://www.drugs.com/medical-answers/eat-food-taking-atorvastatin-3565628/
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR