Supplement containing 500mg GABA, tryptophan, and theanine, 180 tablets. - Product Name: GABA 500 mg - Tryptophan Content: 100 mg - Theanine Content: 100 mg - Contents: 180 tablets - Manufacturer: Shin Nihon Health Thank you for viewing. Brand new, unused. Expiration Date: 2027.06 Purchased in October.