Jun 12, 2025 · Overview A creatinine test is a measure of how well the kidneys are doing their job of filtering waste from the blood. Creatinine is a chemical compound left over from energy …

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 …

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.

Oct 22, 2025 · A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a health condition.

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 …

Apr 22, 2023 · Learn about how to track your menstrual cycles and what any changes may mean.

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 …

Nov 1, 2024 · Aging: What to expect Wonder what's considered a natural part of the aging process? Here's what to expect as you get older — and what you can do about it. By Mayo …

Apr 30, 2025 · The PSA test is a blood test used primarily to screen for prostate cancer. The test measures the amount of prostate-specific antigen (PSA) in your blood. PSA is a protein …

Aug 25, 2023 · An enlarged spleen is usually detected during a physical exam. Your doctor can often feel it by gently examining your left upper belly. However, in some people — especially …