Coupon Codes not valid for this testing. Fasting Required: 10-12 overnight fasting is preferred Lab: Quest Diagnostics Specimen: Blood Results: Test run Mon, Wed, Fri; Report available in 5 days Average processing time 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. Description Beta Carotene, a fat soluble nutrient, is a precursor to vitamin A. Deficiencies may lead to vitamin A deficiency. Excessive vitamin A intake may lead to headaches, loss of appetite, nausea and diarrhea, skin changes, and potential birth defects. Alternative Names: Beta Carotene