Reply to Abdulla A.-B. Badawy - Acute tryptophan or tyrosine depletion test: time for reappraisal?

Lythe K E , Anderson I M , Deakin J F W , Elliott R , Strickland P L (2005) Lack of behavioural effects after acute tyrosine depletion in healthy volunteers . J Psychopharm 19: 5-11