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Vitamin A is a fat-soluble vitamin that promotes normal vision, contributes to growth of bone, teeth, and soft tissues, and helps maintain skin and mucous membranes. Vitamin A also supports the formation of thyroid hormones and helps to fight infections.
An 8 to 12 hour fast is required for this blood test. However, drink plenty of water and take your medications as prescribed. No foods or supplements containing vitamin A should be ingested in the previous 48 hours leading up to the test.
This test does not measure beta carotene, the precursor to vitamin A (the active form). If you would like to measure beta carotene use test code LC001529.
The laboratory services are for informational purposes only. It is not the intention of National Diagnostics, Inc and Life Extension to provide specific medical advice but rather to provide users with information to better understand their health. Specific medical advice including diagnosis and treatment will not be provided. Always seek the advice of a trained health professional for medical advice, diagnosis or treatment.
Both the physician and the testing laboratory are independent contractors with whom National Diagnostics, Inc makes arrangements for your blood tests. Neither National Diagnostics, Inc or Life Extension will be liable for any acts or omissions of the physician, the testing laboratory, or their agents or employees.
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