Absolute Nutrition Immunity Zinc is the best zinc supplement with vitamins C and B on the market. The liquid formula contains 10mg of quality zinc glycinate, 16mg of vitamin B3, 2.4mcg vitamin B12, and 50mg of vitamin C in just one serving. This supplement will boost your immune system and improve your body’s wound-healing and infection-fighting ability. And since it comes in liquid form, it’s highly bioavailable and will enter your bloodstream minutes after consumption.