Fat Soluble Vitamins; serum
Nutritional testing of circulating levels of fat-soluble vitamins provides a good indication of their status throughout the body. The primary fat-soluble vitamins are involved in a vast array of protective and regulatory functions. The thoroughly intertwined and complementary actions among some of the fat-soluble vitamins is equally impressive with respect to optimization of health and disease prevention. Although overt deficiencies are rare, marginal status of specific fat soluble vitamins may be affected by poor diets, inappropriate supplementation, smoking, excessive alcohol consumption, malabsorption, and increased demand associated with chronic conditions such as cardiovascular disease and diabetes.
Learn more »
5 to 7 days
Click any analyte name for additional clinical information, including reference ranges, specimen collection, stability and rejection criteria.
List price applies when filing with insurance or Medicare, or when billing a patient directly.
Prompt payment pricing applies when billing to a physician account or prepayment is received with the test.
Doctor's Data offers profiles containing multiple analytes. *Multiple analytes may be billed under a single CPT code. Many analytes can be ordered individually. Pricing may vary. Click on a specific analyte for more information or read our detailed billing and payment policies.
The CPT codes listed on our website are for informational purposes only. This information is our interpretation of CPT coding requirements and may not necessarily be correct. You are advised to consult the CPT Coding Manual published by the American Medical Association. Doctor's Data, Inc. takes no responsibility for billing errors due to your use of any CPT information from our website.
Sign in at the top of any page to view pricing and order tests. Or click here to create an account. You may also contact us for assistance placing an order.
Nutritional testing of circulating levels of fat-soluble vitamins (FSV) provides a good indication of their status throughout the body. All FSV have vital independent physiological functions, but there are also very important interactive functions among the FSV that should be considered. Beta-carotene, an anti-oxidant and excellent indicator of fruit and vegetable consumption, is the primary plant source (precursor) of vitamin A (retinol). Beta-carotene has other functions and its conversion to vitamin A varies significantly among individuals. Low thyroid function may slow the conversion of beta-carotene to vitamin A, and a significant percentage of the female population has diminished capacity to convert beta-carotene to vitamin A. The levels of beta-carotene and vitamin A are regulated independently, emphasizing the importance for assessing the status of both vitamin A “vitamers” through nutritional testing.
Vitamin E and CoQ10 are the primary anti-oxidants among the FSV and they protect against oxidation of polyunsaturated fatty acids in cell membranes and circulating lipoproteins; oxidized LDL is an independent risk factor for cardiovascular disease. Among the E vitamers, α- and ᵧ-tocopherol have complimentary roles as anti-oxidants with ᵧ-tocopherol having a greater role in protection against reactive nitrogen species. Over consumption/supplementation with α-tocopherol lowers ᵧ-tocopherol status, emphasizing the need to assess the levels of both primary forms of tocopherol. One also needs to pay attention to very high levels of vitamin E as they may prolong clotting time. That is especially important with poor vitamin K status (elevated undercarboxylated osteocalcin) that may impair with the normal coagulation cascade.
Due to the heightened awareness of the vital regulatory roles of vitamin D, coupled with a high prevalence of vitamin D insufficiency in North America, there has been a significant increase of vitamin D supplementation. Indeed low vitamin D levels have been associated with increased risk of hip fractures, depression, and cardiovascular disease. However, addressing vitamin D status without attention to that of vitamins K and A may be consequential in the long run regarding bone health and undesirable calcium deposition. Vitamin K-dependent calcification of specific proteins, such as osteocalcin, is very important for several physiological functions including and bone and vascular health. A high serum level of undercarboxylated osteocalcin indicates a functional deficiency of vitamin K in the body, and should be addressed along with clinical intervention to optimize vitamin D levels.
For nutritional testing to address your patients' symptoms, reach out to Doctor's Data.