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Source Naturals

Serene Science L-Theanine

Item | SN387

  • L-Theanine from Source Naturals



  • Unique amino acid derived from the green tea plant



  • Supports natural relaxation


$23.79
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Supplement Facts

Serving Size 1 Capsule

Amount Per Serving   % Daily Value
L-Theanine 200 mg

†Daily Value not established.

Other ingredients: microcrystalline cellulose, gelatin (capsule), silica, and magnesium stearate.

Suggested Use: 1 capsule 1 to 2 times daily.

WARNING: Not for use by infants, children, or women who are pregnant, may become pregnant, or breastfeeding. If you are taking any antidepressant drugs, such as MAOIs or SSRIs, consult your health care professional before taking this product.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

  • HYPOALLERGENIC: contains no yeast, dairy, egg, gluten, corn, soy or wheat.
  • Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.
  • L-Theanine from Source Naturals



  • Unique amino acid derived from the green tea plant



  • Supports natural relaxation


L-Theanine from Source Naturals is a dietary supplement featuring this unique amino acid found almost exclusively in the tea plant (Camellia sinensis) and is the primary ingredient contributing to the unusual taste of green tea. Research has shown that L-theanine crosses the blood brain barrier, supports healthy neurotransmitter levels and inhibits the stimulatory properties of caffeine. Human studies have shown that taking L-theanine results in the emission of brain waves associated with a state of relaxation.

Terms and Ingredient Definitions

Shipping Weight: .11 lbs

Gluten-Free

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.

MSRP: $33.98

For our website and catalog, the MSRP is the "Manufacturer's Suggested Retail Price." The MSRP is understood to mean the price at which a manufacturer will recommend a retailer sell a product for in stores, on the internet, or in catalogs. The MSRP of National brand items are dictated to Swanson by each manufacturer. For Swanson brand items, the MSRP is calculated based on a varying percentage above the product's base price.

Disclaimer: Product reviews are provided for informational purposes only. The information or opinions expressed therein are solely those of the contributors and do not necessarily represent those of Swanson Health Products and its employees. Please read full product reviews disclaimer.
1-5 of 10 reviews
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Sleep aid
This helps me get a good night's sleep.
Quality: 5.0 / 5.0
Value: 4.0 / 5.0
Effectiveness: 5.0 / 5.0
Convenience: 5.0 / 5.0
Satisfaction: 5.0 / 5.0
Helpful?
Quality: 5.0 / 5.0
Value: 5.0 / 5.0
Effectiveness: 5.0 / 5.0
Convenience: 5.0 / 5.0
Satisfaction: 5.0 / 5.0
Helpful?
bmwtex
My wife takes this product every evening to help her relax and sleep. it works very well for her and it was recommended to her by our family doctor. we have recommended it to several friends.
Quality: 5.0 / 5.0
Value: 5.0 / 5.0
Effectiveness: 4.0 / 5.0
Convenience: 5.0 / 5.0
Satisfaction: 5.0 / 5.0
Helpful?
great product
I have tried many L-Theanine-and this is the best one I have found.
Helpful?
Peaceful Sleep
I heard this product can help you sleep better and fall asleep faster. Seems to be working for me!
Quality: 4.0 / 5.0
Value: 4.0 / 5.0
Effectiveness: 3.0 / 5.0
Convenience: 4.0 / 5.0
Satisfaction: 4.0 / 5.0
Helpful?

Swanson Health started in 1969 in Fargo, ND with a mission to offer pure and potent health products at a great value. Over 50 years later, we continue to innovate science-backed vitamins and supplements, delivering wellness solutions that help people live simply healthier together, and find vitality at any age. Click here to learn more about us.

For over 50 years, Swanson Health's research and development team has delivered science-backed health and wellness products to people around the world. Our innovation is guided by clinical research, scientific consensus, emerging research and usage traditions, creating products that help you find vitality at any age. At Swanson, we don't hide our science behind proprietary formulas — we believe in easy-to-read, transparent labelling. What's printed on our labels, is exactly what you'll find in our products.

Swanson Health's purity and potency testing begins with our ingredient sourcing, continues through manufacturing, and goes beyond when a product hits the shelf. Our testing exceeds industry standards, ensuring each product meets our quality guarantees for purity and potency. Swanson facilities are Good Manufacturing Practices (GMP) certified, and we voluntarily participate in third-party, independent laboratory testing. With Swanson, you can be sure you're getting the most pure and potent health products at a great value. Click here to learn more about our quality standards.

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