Vitamin D + B12 + (FREE) Active Vitamin B12

The Vitamin B12 test measures the amount of vitamin B12 in your blood. Vitamin B12 is important for a healthy nervous system, making red blood cells, and helping in DNA formation. Low B12 levels are common in older adults, children, vegans or vegetarians, people with diabetes, those who had gastric bypass surgery, breastfeeding women, and people with conditions like Crohn’s disease that affect vitamin absorption. High B12 levels can occur in liver diseases, certain blood disorders, or from taking vitamin supplements. Usually, high levels from supplements are not harmful, as extra B12 is removed through urine.

The Vitamin D (25-Hydroxy) test measures the levels of vitamin D in the body. Vitamin D is an essential nutrient that can be synthesized in the body upon healthy exposure to sunlight or absorbed from dietary sources. It exists in two forms: vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol). Vitamin D2 is present in plants, such as yeast or mushrooms, and is available as a supplement in fortified foods. Vitamin D3 is found in foods like cheese, mushrooms, egg yolks, and fatty fish.

Both forms of vitamin D need to be converted in the liver and kidneys before the body can use them effectively. This test shows the total level of vitamin D (D2 + D3) circulating in the body and guides your doctor in recommending the right treatment or lifestyle changes if needed.

The Vitamin B12 Active (Holo Transcobalamin) test measures the level of holotranscobalamin, the active form of vitamin B12 that is absorbed and used by the body’s cells. This test provides a more precise and sensitive evaluation of the body’s usable vitamin B12 compared to total B12 tests, which also measure inactive forms. Low active B12 levels can indicate that the body is not receiving enough functional B12, even if total B12 levels appear normal. This test can serve as an early warning sign of deficiency, which may impact blood health and nerve function.