Sample should be started following a 10-12 hour fasting. During fasting period do not eat anything, you can drink only water (do not drink juice, coffee, tea or any other beverage). You can take medicine unless your physician tells you not to.
Transport Condition and sample stability
Bring sample to the lab within three hours after collection in ambient temperature; in case of processed sample (e.g., for researchers, field collection) plasma is stable for 7 days at 2-8°C and 2 days at 15-25°C. Separate plasma from cells as early as possible.