
Ferritin test - Mayo Clinic
Dec 19, 2023 · Overview A ferritin test measures the amount of ferritin in the blood. Ferritin is a blood protein that contains iron. This test can be used to find out how much iron the body stores. If a ferritin …
Blood pressure chart: What your reading means - Mayo Clinic
Dec 23, 2025 · Ideal blood pressure is categorized as normal. Increased blood pressure may be categorized as elevated, stage 1 or stage 2 depending on the specific numbers. A diagnosis of high …
Ejection fraction: An important heart test - Mayo Clinic
Jan 29, 2025 · Ejection fraction is a measurement of the percentage of blood leaving the heart each time it squeezes. When the heart squeezes, it's called a contraction. Ejection fraction is just one of many …
Mental health: What's normal, what's not - Mayo Clinic
Mental health is the overall wellness of how you think, behave and manage your feelings. A mental health condition may be present when patterns or changes in thinking, feeling, or behaving cause …
Vitamin D - Mayo Clinic
Mar 21, 2025 · Vitamin D is a nutrient the body needs, along with calcium, to build bones and keep them healthy. The body can absorb calcium only if it has enough vitamin D. Calcium is a major part of …
Low blood pressure (hypotension) - Symptoms and causes
Jun 13, 2024 · What's considered low blood pressure for one person might be OK for someone else though. Low blood pressure might cause no symptoms that you notice. Or it might cause dizziness …
Thyroid peroxidase antibody test: What is it? - Mayo Clinic
Jul 9, 2024 · The thyroid peroxidase antibody test is a blood test. Sometimes it's done to help find out if a person has thyroid disease that's caused by an immune system condition. The test isn't used alone …
Hyponatremia - Symptoms and causes - Mayo Clinic
Jul 18, 2025 · Hyponatremia is the term used when your blood sodium is too low. Learn about symptoms, causes and treatment of this potentially dangerous condition.
Urinalysis - Mayo Clinic
Oct 24, 2023 · A higher than normal concentration often is a result of not drinking enough fluids. Protein. Low levels of protein in urine are typical. Small increases in protein in urine usually aren't a cause for …
Hydrocephalus - Symptoms and causes - Mayo Clinic
Mar 17, 2026 · Normal-pressure hydrocephalus. Most common in older adults, this type causes the brain's ventricles to enlarge, but the pressure of the fluid stays within a typical range. It can affect …