Key Takeaways:

• Introduces readers to the specific functions of individual amino acids—such as tryptophan, tyrosine, and glutamine—in mood regulation, energy, and tissue repair.
• Describes protocols using targeted amino-acid supplements to address issues like depression, anxiety, fatigue, and addiction recovery, positioning them as “nutritional neurotransmitters.”
• Exemplifies 1980s enthusiasm for nutraceuticals that blur the line between nutrients and psychoactive drugs, expanding the toolkit of orthomolecular medicine.