Lipitor is a medication used to lower cholesterol levels in the blood, and its effectiveness may be impacted by dietary habits. The active ingredient in Lipitor is atorvastatin, which works by inhibiting an enzyme in the liver that is responsible for producing cholesterol [1]. According to a study published in the National Library of Medicine, the effectiveness of atorvastatin is not significantly impacted by high-fat meals [3]. However, the absorption of the medication may be delayed when taken with high-fat meals, which could result in a lower maximum concentration of the drug in the bloodstream [3]. It is recommended to take Lipitor at the same time every day, with or without food, as directed by a healthcare provider [1].

The keto diet, which is high in fat and low in carbohydrates, has gained popularity in recent years. According to a cardiologist at Penn Medicine, the keto diet may have some benefits for weight loss and blood sugar control, but it may also increase cholesterol levels [2]. This could potentially impact the effectiveness of Lipitor in managing cholesterol levels. It is important for individuals taking Lipitor to discuss any dietary changes with their healthcare provider to ensure optimal management of their cholesterol levels.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.pennmedicine.org/news/news-blog/2019/april/a-cardiologists-take-on-the-keto-diet
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5766553/