High TSH levels usually mean the thyroid is underactive, which is called hypothyroidism. TSH levels can change due to factors like age, sex, and pregnancy. TSH influences thyroid hormones that control ...

Please provide your email address to receive an email when new articles are posted on . Very high and very low levels of vitamin D seem to be linked to elevated risk for falls and fractures. More ...

Dear Dr. Roach: My mother’s blood test has a sodium level of 130 mEq/L. She is not on diuretics, and she does not have heart or kidney problems. She is on thyroid medication and omeprazole. Do I need ...

“Normal” levels of vitamin B12 may not be enough to ward off dementia, new research finds. Researchers at the University of California San Francisco studied 231 healthy older adults (averaging 71 ...

Pancreatic elastase is the digestive enzyme the pancreas produces to help digest food. Doctors can measure elastase levels by testing a stool sample. Low levels could indicate exocrine pancreatic ...

Elevated prolactin levels can cause symptoms like irregular periods and nipple discharge. Low prolactin levels are less common and can cause a reduced milk supply in lactating individuals. High ...

A recent Consumer Reports investigation found that many popular protein powders and shakes contain concerning levels of lead. The results sparked widespread interest among readers, many of whom rely ...