Tyrosine is made in the body from another amino acid called phenylalanine. It is used in the body to make the catecholamines dopamine and norepinephrine. Under stressful conditions, these ...

and then only given a food source without phenylalanine, your body chemistry would subtly change. Leyton thought the ...

Discover why essential amino acids are crucial for health, who needs them most, signs of deficiency, and how to boost intake.