After reviewing the sources provided, there is no direct evidence to suggest that Lipitor affects the absorption of skim milk.

Lipitor (Atorvastatin) is a medication used to lower cholesterol levels in the blood [1]. According to the Drug Patent Watch website, there is no known interaction between Lipitor and skim milk [1].

However, skim milk is a good source of vitamin D, which is essential for bone health and calcium absorption [3]. A study published in the National Center for Biotechnology Information suggests that taking Lipitor may decrease vitamin D levels in the body [2]. This is because statins, including Lipitor, can interfere with the production of vitamin D in the liver [2].

Therefore, it is important for individuals taking Lipitor to monitor their vitamin D levels and consider taking vitamin D supplements to ensure adequate absorption of calcium [2][3]. However, there is no evidence to suggest that Lipitor affects the absorption of skim milk directly [1].

In conclusion, while Lipitor may decrease vitamin D levels in the body, there is no direct evidence to suggest that it affects the absorption of skim milk. Individuals taking Lipitor should monitor their vitamin D levels and consider taking supplements if necessary to ensure adequate calcium absorption.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1312230/
[3] https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/