Coffee and tea lovers, rejoice; decaf fans, rethink. Those cups of caffeine could lower your dementia risk, new research suggests. In a long-term, observational study of nearly 132,000 healthy adults, daily consumption of two to three cups of caffeinated coffee or one to two cups of tea was associated with lowering dementia risk, slowing cognitive decline and preserving cognitive function. The findings were published Monday in the Journal of the American Medical Association . “We are not