The sources provided do not directly answer the question of whether Lipitor can reduce turmeric's effectiveness. However, the sources do provide some relevant information that can help us understand the potential interactions between Lipitor and turmeric.

Lipitor is a brand name for the drug atorvastatin, which is used to lower cholesterol levels in the blood [1]. Turmeric is a spice commonly used in traditional medicine to treat a variety of conditions, including inflammation, pain, and digestive issues [2].

One study published in the Journal of Medicinal Food found that turmeric supplements may help reduce cholesterol levels in people with metabolic syndrome [2]. However, this study did not investigate the potential interactions between turmeric and cholesterol-lowering medications like Lipitor.

Another study published in the Journal of the American College of Cardiology found that statins like Lipitor are vastly superior to supplements in reducing cholesterol levels and preventing cardiovascular disease [3]. The study did not specifically mention turmeric, but it suggests that statins like Lipitor are more effective at reducing cholesterol levels than supplements like turmeric.

Overall, there is no clear evidence to suggest that Lipitor can reduce turmeric's effectiveness. However, it is important to talk to a healthcare provider before taking any supplements or making changes to medication regimens, as there may be potential interactions or side effects to consider.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5637251/
[3] https://www.npr.org/sections/health-shots/2022/11/06/1134094540/statins-vs-supplements-new-study-finds-one-is-vastly-superior-to-cut-cholesterol