Lab Tests Reference Library

25-hydroxy Vitamin D is the best test to measure Vitamin D status. Deficiency is extremely common globally and linked to bone disease, immune dysfunction, depression, and cardiovascular disease.

Vitamin B12 is essential for nerve function, DNA synthesis, and red blood cell formation. Deficiency causes macrocytic anemia, peripheral neuropathy, and cognitive impairment. Common in vegans and elderly.

Folate is a B vitamin essential for DNA synthesis and cell division. Deficiency causes macrocytic anemia and, in pregnancy, neural tube defects. Critical during first trimester of pregnancy.

Ferritin is the main iron storage protein and the best indicator of total body iron stores. Low ferritin is the earliest marker of iron deficiency, even before anemia develops.

Serum iron measures iron circulating in the blood. Used alongside TIBC and ferritin to fully assess iron status.

TIBC measures the blood's capacity to bind iron with transferrin. Elevated TIBC with low ferritin confirms iron deficiency anemia.

Calcium is essential for bone structure, muscle contraction, nerve function, and blood clotting. Abnormal calcium levels can cause severe symptoms affecting the heart and nervous system.

Magnesium is involved in hundreds of enzymatic reactions including energy production, protein synthesis, and muscle/nerve function. Deficiency is common and linked to cardiovascular disease, diabetes, and migraines.

Zinc is essential for immune function, wound healing, DNA synthesis, and taste/smell sensation. Deficiency impairs immunity and growth, especially in children.