In addition to being pretty terrible for the environment, Immer says Keurig Coffee Makers also pose some potential health dangers. Not only do you expose yourself to plastic that’s been heated, but Keurigs tend to get dirty, fast. “The water tanks in a Keurig can never truly be flushed and cleaned. We are concerned about mold and bacteria growth in these tanks over time, much like commercial ice machines,” Immer says.
In the 1980s and 1990s several prospective cohort studies were done to investigate the correlation between coffee and diabetes. Many of those studies reported that there is an inverse dose-dependent association with the risk of Type 2 diabetes. This means that for reasons still unclear, all those research studies found that the more coffee people with normal blood sugar drank, the less risk appeared for developing Type 2 diabetes. Several constituents in coffee might be responsible for these consistent findings.
Feeling a little slow lately? All it might take to get your body back to working at a normal pace is a little coffee. A 2005 study from the Radiological Society of North America found it doesn’t take much—just a couple cups—to improve your reaction time, making you better at everything from noticing something scary like smoke in your home (and realizing you need to grab the fire extinguisher ASAP) to breaking your car for a stop sign.