325 results found
Medical tests
… in foods such as liver; citrus fruits; dark green, leafy vegetables (spinach); whole grains; and beans. Folic acid is … The amount of folate in red blood cells measures the level when the cell was made, as much as 4 months earlier. This … people who can't eat very much food, such as people with alcohol use disorder , certain cancers, or an eating …
Medical tests
… gland controls the level of testosterone in the body. When the testosterone level is low, the pituitary gland … during puberty. This causes boys to develop a deeper voice, get bigger muscles, make sperm , and get facial and body … for cancer of the prostate gland. Long-term (chronic) alcohol use can cause a low testosterone level. In women, a …
Medical tests
… reaction. People who have one autoimmune disease may get another one. Tell your doctor if you have any new or … This can show Hashimoto's thyroiditis. It also can help your doctor tell if mild hypothyroidism is likely to … to take a blood sample, usually from the arm. How It Feels When a blood sample is taken, you may feel nothing at all …
Medical tests
… are to glare (brightness acuity), how well your eyes work together to provide depth perception, and more. Vision tests … or low vision. Visual acuity (sharpness) tests. These tests help your doctor find out if you have a problem that affects … errors, such as nearsightedness or farsightedness , occur when light rays entering the eye can't focus exactly on the …
Medical tests
… test that offers information about your health risks may help you to decide to make lifestyle changes that help you … to the vendor. Their lab does the genetic testing. You'll get the test results back, either online, by mail, or by … or explain results. Risks There are some things to consider when you use an at-home genetic test. The test may not be as …
Medical tests
… detects antibodies that are made by the immune system to help kill the rubella virus. These antibodies remain in the … to take a blood sample, usually from the arm. How It Feels When a blood sample is taken, you may feel nothing at all … is good—it means that you are immune to rubella and cannot get the infection. This is the most common rubella test …
Medical tests
… temperature is a measure of how well your body can make and get rid of heat. The body is very good at keeping its temperature within a safe range, even when temperatures outside the body change a lot. When you … You may start to sweat. As the sweat evaporates, it helps cool your body. When you are too cold, your blood …
Medical tests
… culture is done to: Find the cause of symptoms. It can help explain symptoms such as severe or bloody diarrhea or … intestine (colitis), cholera , and typhoid . Identify a person who may not have any symptoms of disease but who … Urinate before you collect the stool. That way, you won't get any urine in the stool sample. Do not urinate while you …
Medical tests
… Test Overview This test measures the amount of lead in a person's blood. Lead is a poisonous (toxic) metal that can … Done Blood sample from a heel stick A heel stick is used to get a blood sample from a baby. The baby's heel is poked, … A brief pain, like a sting or a pinch, is usually felt when the lancet punctures the skin. Your baby may feel a …
Medical tests
… blood cells. This causes anemia . Also, sickled cells can get trapped in blood vessels and reduce or block blood flow. … information. Why It Is Done A sickle cell test is done to help diagnose sickle cell disease. A sickle cell test is … blood are collected. How It Feels Blood sample from a vein When a blood sample is taken, you may feel nothing at all …
