L-Glutamine- Glutamine is an amino acid which is responsible for a multitude of biochemical functions in humans. L-Glutamine is generally found in dietary sources such as chicken, beef, eggs, milk and dairy products, fish, spinach, wheat, parsley, cabbages, beans and beets. Glutamine is apparently the most common amino acid occurring naturally, furthermore this non essential amino acid is one of just a few, which are able to directly cross the blood brain barrier. In the human body, L-Glutamine is found in the skeletal muscles, but also in the blood. Besides the vital biological functions, such as fuel for brain, blocking cortisol induced protein catabolism, immune function assistance, protein synthesis and in DNA synthesis, L-Glutamine is used as a supplement for ailing and injured, improving recovery, but also as muscle growth agent in body building and athletic circles.

Vitamin C is an obvious essential nutrient and a deficiency of this will cause scurvy. It is also an antioxidant and acts as an electron donor for eight different enzymes.