Dopamine is the pleasure and reward neurotransmitter. It is responsible for attention and focusing. It motivates you and stimulates you to engage in life. Its close cousins are the stimulating and energy-giving neurotransmitters epinephrine and norepinephrine. All three are built from the amino acid tyrosine, which in turn comes from the essential

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I describe the mechanisms by which different wavelengths of light impact the cells, tissues and organs of the human body, and how specifically timed light exposure of specific wavelengths can be used to improve sleep, enhance alertness, modulate hormone levels, and improve mood. I also explain the use of ultraviolet and infrared phototherapies to... See more