Tinnitus, or “ringing in the ears,” affects up to 1 in every 10 people and can be disabling for some. Now, scientists at the Massachusetts Ear and Eye Infirmary believe they may have discovered a key cause of the condition: A degeneration of nerves crucial to hearing. “We won’t be able to cure tinnitus until…  read on >  read on >

Elevated levels of thyroid hormone appear to harm the aging brain, increasing seniors’ risk of dementia or other cognitive disorders, a new study finds. High levels of thyroid hormone — a condition called thyrotoxicosis — was associated with thinking problems whether they came from an overactive thyroid gland or from taking thyroid medication, researchers found.…  read on >  read on >

Minding your heart health when you’re young could spare your brain from dementia decades later, new research confirms. Chinese researchers looked at data on more than 450,000 older Britons. They found that people who’d already been in poor cardiovascular health before they reached the age of 45 had a 25% higher odds of developing dementia,…  read on >  read on >