This depends on a lot of factors, including the beans used, steeping time, and dilution. The dilution is the factor that is the easiest to control. Don’t drink cold brew concentrate straight—it’s highly caffeinated!
Since the water is cold, it needs to steep for about 12 to 18 hours to soak up the coffee’s color, flavor and caffeine. The cold extraction process brings out fewer of coffee’s bitter compounds, which produces a sweeter and smoother result.