A blood osmolality test measures the blood for the concentration of certain dissolved particles. This test can show whether a person has an irregular balance of fluids in their body. Osmolality tests ...

Scientists looked at three measures in the blood: LDL cholesterol; lipoprotein(a), a type of fat; and C-reactive protein, a marker of inflammation. A new approach to a routine blood test could predict ...

A thyroglobulin antibody (TgAb) test looks for certain antibodies that attack the thyroid. The presence of TbAb in high levels may indicate that someone has an autoimmune condition. To conduct a TgAb ...

A stress test can help doctors diagnose certain heart conditions, but it’s a good idea to consider ages when deciding who might undergo this exercise-based screening. Share on Pinterest FG Trade/Getty ...

DEAR DR. ROACH: I am 85 and healthy apart from polycythemia vera, for which I take aspirin. I was interested in the new blood test for cancer. Is it worthwhile? -- M.N. ANSWER: When screening patients ...

Though not infallible, alcohol tests are a dependable way to determine whether someone has consumed alcohol in the past few months. An alcohol hair test can detect whether a person has consumed ...

For the first time, people worried about their risk of Alzheimer’s disease can go online, order a blood test, and receive results in the privacy of their homes. This might seem appealing on the ...

A new approach to a routine blood test could predict a person’s 30-year risk of heart disease, research published Saturday in the New England Journal of Medicine found. Doctors have long assessed ...