Lipitor, also known as atorvastatin, is a medication commonly used to lower cholesterol levels. Research suggests that atorvastatin may have an impact on calcium absorption from plant sources. Calcium absorption is closely linked to the body's ability to produce vitamin D, and atorvastatin has been associated with potential reductions in vitamin D levels [2]. Vitamin D plays a crucial role in calcium absorption, and any interference with its production or function can affect how the body absorbs calcium from various sources, including plants [2].

Since atorvastatin may affect vitamin D levels, it is plausible that it could indirectly impact calcium absorption from plant sources by potentially disrupting the body's ability to utilize vitamin D efficiently [2]. However, more specific studies directly linking atorvastatin to reduced calcium absorption from plant sources are needed to provide a definitive answer.

In conclusion, while there is evidence to suggest that atorvastatin may influence vitamin D levels, which could in turn affect calcium absorption, further research is required to determine the exact impact of atorvastatin on calcium absorption from plant sources.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/
[3] https://pubchem.ncbi.nlm.nih.gov/compound/Atorvastatin