acid were excreted within 3 h and up to 24 h postconsumption.
The total amount of L-theanine excreted within 24 h after intake
of both capsules (17.3 mmol) and tea (14.2 mmol) corresponded
to 3.1 and 2.4% of ingested L-theanine (100 mg 575 mmol),
respectively. The excretions of L-theanine, ethylamine, and
glutamic acid were comparable after both treatments (Table 3).