Osterly Market L-Theanine 200 mg

200 mg L-theanine. One amino acid.

Two hundred milligrams of L-theanine and nothing else — the dose most of the research uses, without a 'calm matrix' built around it.

What it's for

L-theanine is an amino acid found almost exclusively in tea leaves. It is the reason a cup of green tea feels different from the same caffeine in coffee. It increases alpha brain wave activity — the pattern associated with relaxed alertness — without sedation. The research is small-scale but unusually consistent for this category.

How to take it

• One capsule as needed, or daily
• Works within thirty to sixty minutes, unlike most things on this shelf
• Pairs particularly well with caffeine — the combination is better studied than either alone
• Non-sedating, so it will not make you sleepy during the day

On the label

• 200 mg L-theanine per capsule
• Single ingredient
• 120 capsules

What this is not

• Not a sedative
• Not a 'calm blend'
• Not habit-forming

The straight answer

L-theanine is most interesting taken alongside caffeine rather than instead of it. That is a smaller claim than the category usually makes.

Free shipping on every order, no minimum. Questions or a complaint about shipping or a product? Email us and a person will answer.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. Talk to your doctor before starting any supplement, especially if you are pregnant, nursing, or taking prescription medication.