Nature's Way Immune Support Tablet to support a healthy immune system and help reduce the occurrence of common colds all year round use nature's way immune support. Immune system health zinc, vitamin c and vitamin d support a healthy immune system function. Cold and flu symptoms vitamin c and zinc may reduce the occurrence and duration of common colds and the severity of common cold and flu symptoms. Mild upper respiratory tract infections echinacea may help to reduce the severity of the symptoms associated with mild upper respiratory tract infections. Support during stress vitamin c helps maintain healthy adrenal gland function which supports a healthy stress response in the body.