L-Theanine – natural supplement for balance and well-being
64 productsL-theanine from green tea. Relaxation without drowsiness, often with caffeine.

NOW Foods
NOW Foods L-Theanine Pure Powder 28g
Delivery 1–2 days

NOW Foods
Now Foods - L-Glutamine Powder (170g)
Delivery 1–2 days

NOW Foods
Now Foods - L-Theanine With Decaf Green Tea, 100mg - 90 Vcaps
Delivery 1–2 days

Life Extension
Life Extension Theanine XR Stress Relief 400 mg - 30 tablets
Delivery 1–2 days

Health Labs Care
Health Labs Care L-glutamine Complex 35 billion
Backorder · 5–7 business days

OstroVit
Glutamine Powder 500g
Delivery 1–2 days

7 Nutrition
7Nutrition - Glutamine Max 1000mg - 120 capsules
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Olimp Labs
Olimp Labs - Glutamine 1400 Mega Caps
Delivery 1–2 days

Jarrow Formulas
Jarrow Formulas - L-Glutamine, 1000mg - 100 Tablets
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Scitec Nutrition
Scitec Nutrition - Mega Glutamine 1000 mg Capsules
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7 Nutrition
7Nutrition - Glutamine (Unflavored - 300g)
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Weider
Weider - Premium L-Glutamine - 400g
Delivery 1–2 days

Muscletech
MuscleTech - Platinum 100% Glutamine - 300g
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Amix
Amix - L-Glutamine - 1000g
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OstroVit
OstroVit Natural Glutamine 500 g powder
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Olimp Labs
Olimp Labs - L-Glutamine Powder 500 g
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Jarrow Formulas
Jarrow Formulas L-Glutamine 750mg 120 Vegetable Capsules
Delivery 1–2 days

NOW Foods
NOW Foods - L-Theanine, 200mg (90 Vcaps)
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OstroVit
OstroVit - L-Theanine + L-Tyrosine - 90 capsules
Delivery 1–2 days

Doctor's Best
Doctor's Best L-Theanine 150mg - 90 Veggie Caps
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Doctor's Best
Doctor's Best - L-Glutamine Powder 300g
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Yamamoto Research
Yamamoto - Glutamine Peptide 500 mg tablets
Delivery 1–2 days

Weider
Weider L-Glutamine 100% Pure Free Form – 400g
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Apex Formulas
Apex Formulas Glutamine 300g - Pure Glutamine Powder, 60 Servings
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Healthy Origins
Healthy Origins - L-Glutamine - 300g Powder
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Weider
Weider - L-Glutamine - 300g
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Revive
Revive Glutamine - 300g powder, 10g per serving
Delivery 1–2 days

Prosupps
Prosupps Glutamine 300g Powder
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Olimp Labs
Olimp Labs Glutamine Mega Caps 1000 mg – 120 capsules
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Mutant
Mutant - Glutamine - 300g powder
Delivery 1–2 days

Yango
Yango L-Glutamine 90 capsules
Delivery 1–2 days

Solgar
Solgar L-Glutamine 500 mg - 100 Vegetable Capsules
Delivery 1–2 days

Swanson
Swanson Pure Energy - 60 Vegetarian Capsules
Delivery 1–2 days

OstroVit
OstroVit L-Theanine 200 mg - 90 capsules
Delivery 1–2 days

Scitec Nutrition
Scitec Nutrition L-Glutamine 5g Powder
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BioTechUSA
BioTechUSA - L-Glutamine 500g powder
Delivery 1–2 days

Kevin Levrone
Kevin Levrone Gold Glutamine 300g
Delivery 1–2 days

Amix
Amix - Coffi Time - 90 capsules
Backorder · 5–7 business days

Nature's Way
Nature's Way L-Theanine 100 mg - 60 Vegetable Capsules
Backorder · 5–7 business days

Nutriversum
Nutriversum L-Glutamine 500g - Pure Amino Acid Powder
Delivery 1–2 days
What is L-Theanine?
L-Theanine is an amino acid primarily found in the leaves of green tea (Camellia sinensis). It has become popular as a dietary supplement due to its unique properties that distinguish it from other amino acids. L-Theanine affects brain activity in a way that can contribute to a sense of calm and focus without causing drowsiness. This amino acid is often taken as a supplement by individuals seeking to support their mental balance in daily life.
L-Theanine is water-soluble and is rapidly absorbed by the body when consumed, either through tea or as a concentrated supplement. Due to its natural occurrence in tea, L-Theanine is a popular choice for those looking for mild and natural methods to complement their health.
Benefits 26amp; Uses
L-Theanine is primarily used to complement a healthy lifestyle and has several appreciated uses. Here are some of the most common reasons many choose L-Theanine as a supplement:
- Support for mental relaxation: L-Theanine can contribute to a calmer mood without negatively affecting alertness.
- Promote focus and concentration: Many use L-Theanine to maintain sharpness and presence during workdays or studies.
- Complement to caffeine: Often combined with caffeine to reduce any anxiety or restlessness that caffeine may cause.
- Natural origin: Since L-Theanine comes from green tea, it can be an attractive option for those seeking natural supplements.
- Flexible dosage forms: Available in capsules, tablets, and powder, making it easy to tailor to individual needs.
How to choose the right L-Theanine
Choosing the right L-Theanine supplement can affect both the experience and the effect. Here are some tips to make an informed choice when buying L-Theanine online:
- Check the dosage: Common doses often range between 100 and 200 mg per serving, but adjust according to your needs and any recommendations.
- Quality and purity: Choose products free from unnecessary additives and with clear information about ingredients and manufacturing processes.
- Supplement form: Consider whether you prefer capsules for easy dosing or powder that can be mixed into drinks.
- Certifications: Products with quality and safety certifications can provide extra assurance.
- Reviews and feedback: Read customer reviews to get an idea of the product’s effect and user-friendliness.
- Combination with other supplements: If you use other products, such as caffeine supplements or adaptogens, some L-Theanine products may suit you better than others.
By considering these factors, you can find the best L-Theanine supplement for your specific needs.
Popular variants
L-Theanine is available in several forms and variants that make it easy to find a suitable supplement:
- Capsules: One of the most popular forms, easy to dose and carry.
- Tablets: Similar to capsules but may contain different fillers and binders depending on the manufacturer.
- Powder: L-Theanine in powder form can be mixed into water, juice, or smoothies. Offers flexibility in dosing and use.
- Combination products: L-Theanine is often combined with caffeine or other amino acids and adaptogens for specific effect profiles.
- Purity level: Some products offer L-Theanine with extra high purity or organic origin, which may be of interest to the quality-conscious.
Frequently asked questions about L-Theanine
What is the difference between L-Theanine and other amino acids?
L-Theanine differs from other amino acids by its unique ability to influence brain activity and promote relaxation without making you tired. It is not a building block for proteins in the same way as many other amino acids, which makes it particularly popular as a supplement.
Can I take L-Theanine together with caffeine?
Yes, L-Theanine is often taken together with caffeine to mitigate any side effects such as nervousness or palpitations. The combination can provide a more balanced and pleasant effect, making it popular among people who want to maintain focus while feeling calmer.
How quickly does L-Theanine work after intake?
L-Theanine is absorbed relatively quickly in the body and many experience effects within 30 to 60 minutes after intake. The effect can be individual and varies depending on dose and whether you take it on an empty stomach or with food.
For more information about other amino acids, please visit our category Amino Acids or discover more supplements that can complement your health.