CARNIVAL Study: Gut Flora Dependent Metabolism of Dietary CARNItine and Phosphatidylcholine and cardioVAscuLar Disease

Group 1: Carnitine supplement for 2 months, No antibiotics, no aspirin for 3 months (1 month prior and during study)

Group 2: Choline supplement for 2 months, No antibiotics, no aspirin for 3 months (1 month prior and during study)

Group 3: Carnitine or Choline for 2 months, antibiotic cocktail (Ciprofloxacin, Flagyl, Vancomycin, and Neomycin) for 1 week

Group 4: Choline supplement for 2 months plus aspirin 81 mg for 3 months (1 month prior to starting the study and 2 months during the study).

Group 5: Carnitine supplement for 2 months plus aspirin 81 mg for 3 months (1 month prior to starting the study and 2 months during the study).