There’s one final key player worth mentioning that affects mood and food cravings. Amino acids are the building blocks of all proteins. Glutamine, the most abundant amino acid in the muscle and plasma of humans, is a stimulating, excitatory organic substance that acts like a brain chemical.
Traditionally considered a nonessential amino acid, it now appears to be an essential nutrient in the body’s response to stress, injury or illness. It’s critical for optimal brain function, boosting mood, increasing alertness and enhancing memory. It also increases libido and facilitates digestion.
Julie M. Simon