Table 2.

The amino acid quantities (amount per 10 kg body weight) for the challenge conditions, including acute tryptophan depletion (ATD, to decrease central nervous system serotonin synthesis), phenylalanine–tyrosine depletion (PTD, to decrease central nervous system dopamine synthesis), and a balanced amino acid load (BAL, which serves as a control condition)

Amino acids	ATD (g)	PTD (g)	BAL (g)
L-Phenylalanine	1.32	–	1.32
L-Leucine	1.32	1.32	1.32
L-Isoleucine	0.84	0.84	0.84
L-Methionine	0.5	0.5	0.5
L-Valine	0.96	0.96	0.96
L-Threonine	0.6	0.6	0.6
L-Lysine-HCl (=L-Lysine 0.9 g/10 kg)	1.2	1.2	1.2
L-Tryptophan	–	0.7	0.7