Lipitor is a medication used to lower cholesterol levels in the blood. According to Drug Patent Watch [1], the active ingredient in Lipitor is atorvastatin calcium. This medication works by blocking an enzyme in the liver that produces cholesterol.

The keto diet is a low-carb, high-fat diet that has become popular for weight loss. According to Penn Medicine [2], the keto diet can help with weight loss and improve blood sugar levels, but it can also increase cholesterol levels in some people.

Everyday Health [3] states that a keto diet can cause a temporary increase in cholesterol levels, but this is usually due to an increase in high-density lipoprotein (HDL) cholesterol, also known as "good" cholesterol. However, this increase in cholesterol levels is typically temporary and should not interfere with weight loss on a low-carb diet.

In conclusion, while Lipitor is a medication used to lower cholesterol levels, it should not interfere with weight loss on a low-carb diet. It is important to note that the keto diet can increase cholesterol levels in some people, but this increase is usually temporary and should not interfere with weight loss. As always, it is important to speak with a healthcare provider before starting any new diet or medication.

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.everydayhealth.com/ketogenic-diet/what-happens-to-your-cholesterol-on-a-keto-diet/