Hyperlipidemia (E.G., Hypercholesterolemia)

The goal of this study is to test the efficacy and feasibility of Colesevelam administration (50% of the recommended dose) to reduce serum PFAS concentration in the Veteran population who have serum PFAS levels that exceed the National Academies Science criteria (PFASsix \> 20 ng/ml) using a double blind-placebo controlled study. Based on PFAS prevalence in serum samples, we anticipate recruiting up to n=500 Veterans to meet the goal of n=50 study participants to receive intervention or placebo. The primary outcome will be initial and final PFAS content in serum (total and 7 individual PFAS). The secondary outcome will be initial and final serum biomarkers related to lipid metabolism. As an exploratory aspect to the proposal, we will also measure fecal PFAS, bile acids, and microbial diversity to examine associations between PFAS content and bile acid levels and microbiome. Fecal PFAS, bile acid content, and microbiome may also be measured.

The goal of this clinical trial is to evaluate the efficacy and safety of a fixed-dose combination of atorvastatin (10 mg) and ezetimibe (10 mg) compared to atorvastatin (20 mg) monotherapy in the Bangladeshi population. Researchers will compare atorvastatin (10 mg) and ezetimibe (10 mg) to atorvastatin (20 mg) monotherapy to see if atorvastatin (10 mg) and ezetimibe (10 mg) FDC works to treat dyslipidemia. Participants will: * Take a fixed-dose combination of atorvastatin (10 mg) and ezetimibe (10 mg) compared to atorvastatin (20 mg) monotherapy for 3 months * Follow-up visits at 6 weeks and 12 weeks for checkups and tests