The only answer provided from the manufacturer, Source Naturals website was "Where does l-theanine come from? It is found almost exclusively in black and green tea. It is the primary ingredient contributing to the pleasant taste of green tea."

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Source Naturals Serene Science L-Theanine, Made with Suntheanine, for Focused Relaxation, 200 mg - 120 Capsules

Source Naturals Serene Science L-Theanine, Made with Suntheanine, for Focused Relaxation, 200 mg - 120 Capsules

Q: How many 200mg capsules are in this product? No mention - assuming it's 30 caps, we bought Jarrow, but for future, would love to know...

HI Saki. There is 200mg and the bottle has 60 capsules.

Q: How long until you notice an effect?

Soon after you take it. Take two at once if you are stressed or have anxiety. For maintenance, you can take one in the morning & one in the evening or just one a day.

Product ID: 2539530

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Details

Brand
Source
Flavor
Unflavored
Primary Supplement Type
L-Theanine
Unit Count
120 Count
Item Form
Capsule
Item Weight
0.1 Pounds

🎯Supports focused attention

🧠200 mg pure Suntheanine

🇺🇸Made in USA, cGMP certified

Frequently Bought Together

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Description

🧘‍♂️ Elevate your calm, sharpen your edge—relaxation redefined.

FOCUS LIKE A PRO - Enhance concentration and mental clarity during high-stakes moments.
STRESS HANDLED - Eases occasional nervousness and tension so you can own your day.
QUALITY YOU CAN TRUST - Crafted in California under strict FDA cGMP standards for purity and potency.
CALM WITHOUT COMPROMISE - Experience serene focus without drowsiness—stay sharp all day.
CLINICALLY BACKED SUNTHEANINE - 200 mg of premium L-theanine for scientifically supported relaxation.

Source Naturals Serene Science L-Theanine delivers 200 mg of Suntheanine per capsule, promoting calm focus without sedation. Manufactured in the USA under FDA cGMP guidelines, it supports mental clarity and helps ease occasional nervousness, making it ideal for busy professionals seeking balanced relaxation.

Have a Question? See What Others Asked

How many 200mg capsules are in this product? No mention - assuming it's 30 caps, we bought Jarrow, but for future, would love to know...

is this from china?

are these breakable tablets?

How long until you notice an effect?

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