Overview: Vitamin B2 TestIntroduction: The Vitamin B2 Test measures vitamin B2 to diagnose deficiency, causing mouth sores or fatigue. Following 2023 WHO guidelines, it uses biochemical methods for high specificity, supporting metabolic screening. This test is critical for guiding diagnosis, treatment planning, and improving outcomes in biochemistry for patients with suspected vitamin B2 deficiency.
Other Names: Vitamin B2 Assay, Riboflavin Test.
FDA Status: Laboratory-developed test (LDT), meeting biochemistry standards for diagnostic accuracy.
Historical Milestone: Vitamin B2 testing began in the 1960s with nutritional research. Biochemical methods improved in the 2000s, enhancing diagnostic precision.
Purpose: Measures riboflavin to diagnose vitamin B2 deficiency, guides treatment, and evaluates patients with mouth sores or fatigue.
Test Parameters: 1. Riboflavin Level
Pretest Condition: No fasting required. Collect whole blood, serum, or plasma. Report history of mouth sores, fatigue, or nutritional deficiencies.
Specimen: Whole Blood (EDTA, 2-5 mL), Serum (SST, 2-5 mL), Plasma (EDTA, 2-4 mL). Transport in a biohazard container.
Sample Stability at Room Temperature: 24 hours
Sample Stability at Refrigeration: 48 hours
Sample Stability at Frozen: Not frozen
Medical History: Document mouth sores, fatigue, or history of nutritional deficiencies. Include current medications or dietary history.
Consent: Written consent required, detailing the tests purpose, B2 deficiency implications, and risks of sample collection.
Procedural Considerations: Uses high-performance liquid chromatography (HPLC) to measure riboflavin levels. Results are available in 1-2 days, supporting clinical decisions. Performed in laboratories, often for nutritional deficiency diagnosis.
Factors Affecting Result Accuracy: Sample hemolysis or improper storage can affect results. Dietary intake may alter riboflavin levels.
Clinical Significance: Low riboflavin confirms B2 deficiency, guiding supplementation therapy. Normal levels may require other nutritional tests.
Specialist Consultation: Consult a nutritionist for result interpretation and treatment planning.
Additional Supporting Tests: Erythrocyte glutathione reductase activity, dietary assessment, or other B-vitamin tests to confirm B2 deficiency diagnosis.
Test Limitations: Non-specific for deficiency cause; clinical correlation is needed. Sample quality affects sensitivity.
References: WHO Nutrition Guidelines, 2023; Journal of Nutrition, Powers HJ, 2022.
