People who drink a lot of tea may have a slightly lower chance of getting Alzheimer’s disease compared to those who drink little or no tea, according to studies tracking large groups of people over time.

People who drink more tea tend to have a slightly lower chance of getting dementia — every extra cup a day might lower the risk by about 4%.

Scientists aren’t sure if drinking tea, coffee, or caffeine affects your risk of dementia or Alzheimer’s — the evidence is too weak to say for sure.

Drinking caffeine doesn’t seem to make you more or less likely to get dementia — people who drink the most caffeine had a tiny bit lower risk, but it’s not enough to be sure it’s real.

People who drink a lot of coffee or consume a lot of caffeine seem to have better memory and slower brain decline as they age, according to studies that watch people over time — so coffee might help keep your brain sharp without costing much.

People who drink 1 to 3 cups of coffee a day might have the lowest chance of getting dementia, according to studies of hundreds of thousands of adults — but drinking more or less than that doesn’t seem to help as much.