Lipitor is a medication used to lower cholesterol levels in the body [1]. According to SingleCare [2], there are certain dietary supplements that should be avoided when taking atorvastatin, the active ingredient in Lipitor. These supplements include red yeast rice, which contains a natural form of lovastatin, a substance that is similar to atorvastatin and can increase the risk of side effects when taken with Lipitor. Other supplements that should be avoided include St. John's Wort, coenzyme Q10, and vitamin D3. St. John's Wort can reduce the effectiveness of atorvastatin, while coenzyme Q10 and vitamin D3 can interfere with the body's absorption of the medication.

ConsumerLab [3] also advises caution when taking certain supplements with statins like Lipitor. They recommend avoiding supplements that contain high doses of vitamin K, as this can interfere with the blood-thinning effects of statins. They also advise against taking supplements that contain grapefruit or grapefruit juice, as this can increase the risk of side effects.

It is important to consult with a healthcare provider before taking any dietary supplements with Lipitor, as they can provide guidance on which supplements are safe to take and which should be avoided. They can also monitor for any potential interactions or side effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.singlecare.com/blog/atorvastatin-interactions/
[3] https://www.consumerlab.com/answers/which-drugs-should-be-avoided-when-taking-statins/statin-supplement-interactions/