4Life NanoFactor Glutamine Prime supplies an added source of support for healthy immune cell function, especially during times of increased stress. Glutamine is an amino acid that serves as a major source of fuel for immune cells. Glutamine is continually needed and used by the immune system, but reserves can become depleted by additional everyday stress, such as exercising and training for athletic events, keeping up with busy day-to-day life, or struggling with various health concerns. Glutamine Prime is formulated with the rich energy source of glutamine to help optimize immune cell function. In addition, it includes the building blocks of the important antioxidant glutathione, which helps protect cells from oxidation caused by free radicals. Glutamine Prime is an excellent companion product to the complete line of 4Life Transfer Factor® products.