During acute tryptophan increase, subjects drank a concoction containing 2.3 g tryptophan, 150 ml water, 100 ml flaoring of their choice and 2 spoons of sugar.

• 在色氨酸急性增加期，受试者饮用一种含有2.；3g色氨酸、150ml水、100ml自选调味剂和2匙糖的混合饮料。