Glutamine is the main fuel source for your body’s lymphocytes, white blood cells that fight infection and disease. But your blood’s glutamine levels decline when we’re sick or injured, reducing these immune cells’ ability to defend your body.

Glutamine is utilised at a high rate by cells of the immune system and is required to support optimal lymphocyte proliferation and production of cytokines by lymphocytes and macrophages. Macrophage-mediated phagocytosis is influenced by glutamine availability.