- Venipuncture. A LifeLabs phlebotomist will draw fasting blood samples from each participant. Biochemical analyses to be completed at LifeLabs include glucose, insulin, 25(OH)D, lipids (total cholesterol; HDL; LDL; triglycerides), high-sensitivity C-reactive protein (hsCRP), and parathyroid hormone (PTH). Various CLA isomers (c9, t11; t10, c12) in red blood cells (Dr. David Ma), and hepatic lipase, lipoprotein lipase and mRNA expression of fatty acid synthase (Dr. Marica Bakovic) will be analyzed in yearly batches at the University of Guelph. Participants are required to fast for this visit; we will provide a juice box and granola bar afterwards.