C peptide is a biomarker for beta cell function. In other words, it's a measure of beta cell health and insulin production, and is critical to developing new disease modifying therapies for type 1 Glutathione Index Test Measure Antioxidant Levels At Home Fatty Acid Labs Which Blood Tests Require Fasting And For How Long? HealthcareOnTime Fasting for blood work typically involves avoiding food and drink (except water) for eight to twelve hours to ensure accurate results, particularly for tests like glucose, cholesterol, and triglycerides. It is important