Heavy training is known to impact the immune system, suppressing it for 3-72 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. SiS Immune is tested under Informed Sport certification. This approach gives you confidence that we pay attention to detail and deliver high quality sports nutrition, whether you are an elite athlete or just trying to keep fit and healthy. After prolonged or intense exercise use one tab in 500ml of water to support immune function as you rehydrate.