Cold brew concentrate is often 1:4 to 1:8. It is literally a concentrated coffee drink and is much stronger - and has much more caffeine - than the same amount of drip coffee liquid. Cold brew coffee—made by steeping coffee grounds in cold water for typically an entire day—is just as healthy as regular coffee, according to nutrition experts...

Cold brew may even be healthier than regular coffee, Hu said. Because it's less acidic than regular, many people may find it tastier and thus have less need to mask the acidic taste with calorie-laden cream, milk, and sugar.