““On the fundamental level of essence, diet, nutrition, and tonic herbs have the most direct influence on vitality. The most important nutritional factors are essential amino acids and essential fatty acids, both of which are required to produce the hormones, enzymes, and neurochemicals upon which vitality depends. These basic building blocks must be taken in conjunction with the synergistic vitamin and mineral cofactors the body needs to convert them into 'vital essence'. For example, zinc and selenium are required to produce antioxidant enzymes, and vitamins B5, and B6 are the essential cofactors the brain needs to convert amino acids into neurotransmitters.””
