Glutamine is highly anti-catabolic. This means that it prevents muscle from being broken down and converted into energy. This is very important during times of stress when
muscle breakdown increases. Every time your body is subjected to stress, whether it’s due to hard training, stress at work, or illness, your body releases cortisol. Cortisol is a powerful hormone that breaks down your muscle tissue. During hard
training sessions, your glutamine stores can fall by as much as 50%. Glutamine has proven so effective at preventing muscle breakdown, it is used in hospitals throughout Europe to treat patients with severe muscle wastage.