Vitamin D (25-Hydroxy) + Vitamin B12 + Thyroid

The Vitamin B12 measures the amount of vitamin B12 in your blood. Vitamin B12 is important for a healthy nervous system, making red blood cells, and creating DNA in your cells. 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, green vegetables, 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 Thyroid Profile Total (T3, T4 & TSH) measures the circulating amounts of three key hormones:

• Total T3​ (Total Triiodothyronine): T3​ is the most active thyroid hormone and plays a major role in metabolism. The Thyroid Profile Total test measures both T3 bound to proteins and free T3 in the blood.
• Total T4​ (Total Thyroxine): T4​ is the primary hormone secreted by the thyroid gland. The Thyroid Profile Total test measures both protein-bound and free T4. It is a good indicator of overall thyroid hormone production.
• TSH (Thyroid Stimulating Hormone): This hormone, released by the pituitary gland, controls the production of T4​ and T3​ by the thyroid. It is the best screening test for determining whether the thyroid is functioning normally.