It’s a bit strange to break down human emotions and feelings into dry, scientific terms, but it’s really the only way to approach the treatment of depression. Amino acids play a large role in producing neurotransmitters, which in turn regulate emotions. When certain of these neurotransmitters are found to be deficient within the body, the person in question can experience feelings of sadness, anxiety and even irritability.

The main amino acid that regulates these emotions is known as l-tyrosine, and it has been made available in various supplements. L-tyrosine also has positive side-effects on other parts of the body such as the thyroid. During particularly stressful times, this amino acid calms the body, provides an energy boost and even enhances sex drive.