Harvard Health Content API

Full-body MRI scans are marketed as a way to detect hidden cancers and other health conditions before symptoms appear. But these elective scans aren’t as precise as medically recommended MRIs and may reveal harmless abnormalities that lead to unnecessary follow-up tests.

Women’s reproductive history, including first period, pregnancy, and menopause, influences their lifetime exposure to estrogen, which appears to shape brain aging and dementia risk. Menopause is believed to be the strongest reproductive factor, with later menopause tied to lower dementia risk.

It’s possible for people of any age to contract sexually transmitted infections (STIs). STIs are sometimes symptom-free, making them easy to miss, pass along, and ignore.

Pain from gallstones (hardened, stonelike lumps of bile or other digestive fluids that block bile ducts) usually occurs in a distinct pattern. Gallstone attacks typically provoke steady, intense pain in the upper right abdomen that can radiate to the shoulder or back.

MRI contrast dye is widely used and considered safe. It helps highlight blood vessels, tumors, and other structures to improve diagnostic accuracy. Rarely, contrast dye can trigger a serious condition called nephrogenic systemic fibrosis in people with advanced kidney disease.

Not all cases of gallstones need treatment. Many people have gallstones that never cause pain or other symptoms and can be left alone. But if gallstones cause persistent pain or other symptoms, doctors often opt to surgically remove the gallbladder.

A 2026 study suggested that women who consistently stay active throughout middle age have a significantly lower risk of dying early than peers who are inactive.

A 2026 study suggested that getting a high-dose flu shot may reduce older adults’ risk of developing Alzheimer’s disease compared with a standard-dose flu shot.