Low 1,25-Dihydroxy Vitamin D Test: Causes, Kidney Disease, Calcium Balance, and Meaning
A low 1,25-dihydroxy vitamin D result means the active hormone form of vitamin D, also called calcitriol, is below the lab’s reference range. This...
Low 25-Hydroxy Vitamin D Test: Causes, Deficiency, Symptoms, and Meaning
A low 25-hydroxy vitamin D test means the main circulating storage form of vitamin D in your blood is below the level your body...
Low Calcium Blood Test: Causes, Symptoms, Hypocalcemia, and Meaning
A low calcium blood test means the amount of calcium circulating in your blood is below the reference range for that lab. The medical...
Low Ceruloplasmin Blood Test: Causes, Copper Deficiency, Wilson Disease, and Meaning
Ceruloplasmin is a copper-carrying protein made by the liver. A low ceruloplasmin blood test means the amount of this protein in your blood is...
Low Chromium Blood Test: Causes, Deficiency, Blood Sugar, and Meaning
A low chromium blood test means the measured chromium level in the sample is below that laboratory’s expected range or reporting threshold. It does...
Low Cobalt Blood Test: Causes, Deficiency, B12 Status, and Meaning
A low cobalt blood test usually means there is no meaningful cobalt exposure in the blood sample, not that the body has a dangerous...
Low Copper Blood Test: Causes, Deficiency, Anemia, and Meaning
A low copper blood test means the amount of copper measured in the blood is below the lab’s reference range. Copper is a trace...
Low Ferritin Blood Test: Causes, Iron Deficiency, Anemia, and Meaning
Low ferritin usually means your body’s iron stores are running low. Ferritin is a storage protein that holds iron for future use, especially for...
Low Ferritin With Normal Hemoglobin: Iron Deficiency Without Anemia
Low ferritin with normal hemoglobin usually means iron stores are running low before anemia has developed. Hemoglobin can stay within the reference range for...
Low Folate Blood Test: Causes, Deficiency, Anemia, and Meaning
A low folate blood test means your blood level of folate, also called vitamin B9, is below the laboratory’s reference range. Folate helps the...
Low Hepcidin Blood Test: Causes, Iron Overload, Anemia Patterns, and Meaning
Low hepcidin means the body is sending a weak “slow down iron” signal. Hepcidin is a hormone made mainly by the liver, and its...
Low Iodine Blood Test: Causes, Thyroid Function, Deficiency, and Meaning
A low iodine blood test result can point toward low iodine intake, but it needs careful interpretation. Iodine is a trace mineral the thyroid...
Low Magnesium Blood Test: Causes, Deficiency, Symptoms, and Meaning
A low magnesium blood test means the amount of magnesium circulating in your blood is below the lab’s reference range. Magnesium is an electrolyte...
Low Manganese Blood Test: Causes, Deficiency, Nutrition, and Meaning
A low manganese blood test means the measured manganese level in the sample is below that laboratory’s reference range. Manganese is an essential trace...
Low Molybdenum Blood Test: Causes, Deficiency, and Meaning
A low molybdenum blood test means the measured amount of molybdenum in blood, serum, or plasma is below the laboratory’s reference range. Molybdenum is...
Low Osteocalcin Blood Test: Causes, Bone Formation, and Meaning
Osteocalcin is a protein made mainly by osteoblasts, the cells that build new bone. A low osteocalcin blood test usually points to low bone...
Low Phosphorus Blood Test: Causes, Symptoms, Mineral Balance, and Meaning
A low phosphorus blood test means the amount of phosphate circulating in the blood is below the lab’s reference range. Phosphorus is a mineral...
Low Selenium Blood Test: Causes, Deficiency, Thyroid Health, and Meaning
A low selenium blood test means your measured selenium level is below the reference range used by the lab, or below the level expected...
Low Serum Iron and Normal Ferritin: What the Pattern Can Mean
Low serum iron with normal ferritin usually means there is less iron moving through the bloodstream, while the storage marker has not fallen below...
Low Serum Iron Test: Causes, Iron Deficiency, Anemia, and Meaning
Low serum iron means the amount of iron circulating in the blood is below the lab’s reference range at the time your blood was...