Coupon Codes not valid for this testing. Fasting Required: Yes 10-12 hours Lab: Quest Diagnostics Specimen: Blood Results: Average processing time 3-5 days Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance. Tests Included: Magnesium : A mineral involved in many processes in the body including nerve signaling, the building of healthy bones, and normal muscle contraction. Zinc : A mineral essential to the body. It is involved in the manufacture of protein (protein synthesis) and in cell division. Zinc is also a constituent of insulin , and is concerned with the sense of smell. Copper : Copper is an essential mineral that the body absorbs into enzymes. These enzymes play a role in the regulation of iron metabolism, development of connective tissue, energy production at the cellular level, the creation of melanin (the pigment that produces skin color), and the function of the nervous system and brain.