Health category
Vitamins & Nutrition
Educational resources about vitamins & nutrition, prevention, screening, and questions to discuss with a healthcare professional.
Trusted-source education
Related published health guides
General patient education—not a diagnosis or a recommendation to request a test.
Vitamin D
Vitamin D supports calcium balance and bone health, and blood testing can measure a form used to assess vitamin D status.
Read the guideVitamin B12
Vitamin B12 is needed for healthy blood cells and nervous-system function.
Read the guideFolate
Folate is a B vitamin involved in cell division and healthy blood-cell formation.
Read the guideRelated laboratory guides
Links for education and navigation only. Confirm availability and preparation with the laboratory.
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Use the published information safely, then confirm test and service requirements with the laboratory.