Science in Sport Immune Tablets are designed to support and maintain immune function during and after exercise. As an effervescent tablet that readily dissolves in plain water, it represents a highly practical approach to support your immune system after exercise.Vitamin C (200mg) and Iron (2.5mg) are known to contribute to the maintenance of the normal function of the immune system during and after intense physical exercise in addition to your RDA. Heavy training is known to impact the immune system, suppressing it for 72 hours post-training. This can lead to a higher incidence of upper respiratory tract Infections, impacting an athletes health and their ability to train. Excessive vitamin intake can suppress the training response. SiS Immune is designed to be at a level which supports athlete health without compromising training benefits.