L-Theanine by Xymogen is a dietary supplement in capsule form. Available in multiple sizes.

• Manufacturer Suggested Use: Take one to two capsules twice daily, or as directed by your healthcare professional.
• Ingredients: Serving Size: 2 Capsule Amount Per Serving L-TheanineS1 ... 400 mg Other Ingredients: Capsule (hypromellose and water), microcrystalline cellulose, ascorbyl palmitate, and medium-chain triglyceride oil.