Pure Encapsulations, Buffered Ascorbic Acid, 250 CapsulesDescription If you need to give your immune system a boost one of the best ways to do so to make sure that you get more vitamin C on a regular basis. Vitamin C is a potent antioxidant that can protect you against common viral infections such as the common cold and the flu. Aside from enhancing your immune system vitamin C is also known as an effective histamine inhibitor. It also helps promote faster wound healing and can help your body cleanse itself