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

Nutricost
Nutricost L-Glutamine Powder 300g
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Labrada
Labrada Glutamin Recovery 500g powder
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Dorian Yates
Dorian Yates Glutamine - 300g Powder
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Doctor's Best
Doctor's Best - L-Theanine Alphawave 200 mg - 60 Vegetable Capsules
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BioTechUSA
BioTechUSA Glutamine Peptide 180 Mega Caps
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Applied Nutrition
Applied Nutrition Glutamine 4K - 120 capsules
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5% Nutrition
5% Nutrition - L-Glutamine 5000 Powder 500 g
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Nutrend
Nutrend - Glutamine Compressed Caps - 120 capsules
Delivery 1–2 days

MuscleMeds
MuscleMeds Glutamine Decanate 300g
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UNS
UNS L-Glutamine powder 200 g
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Forest Vitamin
Forest Vitamin L-Glutamine Powder 500 g
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Applied Nutrition
Applied Nutrition L-Glutamine Powder Micronized 500 g
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Redcon1
Redcon1 Glutamine 300g
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Gaspari Nutrition
Gaspari Nutrition L-Glutamine 300g
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Solgar
Solgar L-Glutamine 500 mg 50 Vegan Capsules
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Kiki Health
L-Glutamine, Unflavoured - 150g | Kiki Health
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Amix
Amix - Glutamine Micro Powder - 500g
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Trec
Trec Nutrition Glutamine High Speed 500 g powder
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Trec
Trec - L-Glutamine Micronized T6 - 240 capsules
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GAT Sport
GAT Sport - L-Glutamine - 300g
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Skull Labs
Skull Labs Glutamine – 300g Powder
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Usa Medical
Usa Medical L-Theanine Relax – 60 capsules
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Cellucor
Cellucor Performance Glutamine 510g Powder
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American Supps
American Supps - Anabolic L-Glutamine - 500g
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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.