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  • Vitamin D

    This blood test measures the level of vitamin D in your body. Vitamin D is essential for strong bones and muscles. Low levels are common in the UK, particularly in winter. The test helps your doctor decide whether you need supplements and at what dose.

    Also known as: Ergocalciferol (vitamin D2); Cholecalciferol (vitamin D3); Calcidiol (25-hydroxyvitamin D [25(OH)D]); Calcifidiol (25-hydroxy-vitamin D); Calcitriol (1,25 dihydroxyvitamin D [1,25(OH)(2)D])

    B Vitamins

    The B vitamins tests are blood tests in which a sample is taken from a vein to measure levels of one or more B vitamins in the bloodstream. They are used to help detect vitamin B deficiencies, which can lead to anaemia, nerve problems and other nutritional or absorption disorders.

    Also known as: Vitamin B complex

    Coagulation Factors

    A coagulation factors test measures the levels or activity of specific clotting factors in a blood sample to assess how well the blood clotting system is working. It is used to diagnose or investigate bleeding disorders such as haemophilia, and to evaluate abnormal clotting related to conditions like liver disease or vitamin K deficiency.

    Also known as: Factor assays; Blood clotting factors; Clotting factors; [or by the individual factor number (e.g. Factor I, Factor II) or name (e.g. Fibrinogen, Prothrombin)]

    Homocysteine

    The homocysteine test measures the level of homocysteine, a sulphur-containing amino acid, in the blood using a blood sample taken from a vein in the arm. It is used to help assess the risk of cardiovascular disease and to investigate conditions such as vitamin B12 or folate deficiency and disorders affecting blood clotting.

    Also known as: Plasma Total Homocysteine; Urine Homocysteine

    Methylmalonic Acid

    A methylmalonic acid test measures the level of methylmalonic acid in the blood or urine using a blood sample taken from a vein in the arm or a urine sample. It is used to help diagnose and monitor vitamin B12 deficiency and to detect rare metabolic disorders such as methylmalonic acidaemia.

    Also known as: MMA

    Vitamin A

    The vitamin A test is a blood test in which a sample is taken from a vein to measure the level of vitamin A in the bloodstream. It is used to help detect vitamin A deficiency or toxicity and to assess nutritional status or conditions affecting absorption.

    Also known as: Retinol

    Vitamin B12 and Folate

    The vitamin B12 and folate test is a blood test in which a sample is taken from a vein to measure the levels of these essential B vitamins in the bloodstream. It is used to help diagnose vitamin B12 or folate deficiency, particularly when investigating anaemia, malnutrition or absorption problems.

    Also known as: Vitamin B12 or Cobalamin; Folic Acid; RBC folate

    Vitamin K

    The vitamin K test is a blood test in which a sample is taken from a vein to measure vitamin K levels and assess its role in blood clotting. It is used to help detect vitamin K deficiency, which can lead to bleeding problems due to impaired clotting factor production.