L-Theanin Natural Forte 500 mg (90 capsules)

€28.06 *

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55 Gramm (€51.02 * / 100 Gramm)

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Art-No. 20333
PZN: 13254765
EAN 4260085383825
Packing size: 90 capsules
Capsule shell type: Vegetarian capsule shell

Take one capsule unchewed daily with non-carbonated water (at least 200 ml). Ideally taken before a main meal.

Ingredients: Green tea extract (contains 40 % L-Theanine), hydroxypropylmethylcellulose (capsule)
Active content: Per 1 capsule: Green tea extract 500 mg, from which L-theanine 100 mg, from which polyphenols 75 mg

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L-Theanine Natural 500 mg Forte

    For the dietary treatment of chronic states of fatigue and stress-related diseases

    For relaxation without inducing fatigue

    Rich in natural L-theanine and polyphenols

    Green tea extract from Sichuan province

    Of a pure vegetarian origin

Mental and physical relaxation with L-theanine

Insomnia and chronic fatigue are serious conditions that can lead to physical and mental illnesses. The causes are various. Especially the working people are exposed to constant stress situations, suffer from lack of exercise due to their sedentary work and they have no time to keep a balanced diet. Moreover, mental stress such as family problems, illnesses or obesity can also lead them to constant fatigue.

According to recent studies, the amino acid L-theanine inhibits the glutamate receptors in the brain. In this way, the active ingredient promotes mental and physical relaxation and thus reduces your stress, without making you sleepy!

With ZeinPharma® L-Theanine Natural Forte, you get a tea leaf extract from the province of Sichuan, which is rich in natural L-theanine and contributes to the dietary treatment of chronic states of fatigue and stress-related diseases.

40 % L-theanine – the highest content in only one capsule

Naturally, L-theanine is found only in three species of the tea plant (Camellia sinensis, Camellia japonica and Camellia sasanqua), as well as in the bay bolete (Xerocomus badius). Since the L-theanine is mainly found only in the leaves, the L-theanine Natural Capsules Forte contain 500 mg of pure leaf extract, which is equivalent to 6.000 mg of fresh green tea leaves. With more than 40 % L-theanine in the leaf extract, our capsules contain the highest possible natural proportion of this amino acid. On the other hand, green tea contains only 1 to 2 percent L-theanine, thus you would need to drink 60 cups in order to get the same effect. However, with the green tea you also take up large amounts of caffeine, which reduces the relaxing effect of L-theanine. When purchasing L-theanine preparations, be careful not to succumb to any attempts of deception. Many preparations are being marketed which suggest a L-theanine content of far over 40%. This is not possible on a natural basis. In addition L-Theanine Natural Forte capsules contain at least 30 % polyphenols. These phytochemicals protect the plants from oxidative stress and predators. Benefit from the relaxing effect of L-theanine as well as the various positive properties of the polyphenols.

What else should you know about L-theanine?

Make sure that you only consume natural theanine, as the L-form is predominantly formed in the plants and the D-form, which has no known function, is almost completely degraded. On the other hand, if theanine is produced synthetically, then both forms are present in the same ratio of 50:50. Consequently, synthetic theanine preparations have only a 50% efficiency.

Furthermore, the amino acid has a mild taste. Thus, the capsules can be opened in order to melt the powder in the mouth or to dissolve it in water. As L-theanine in higher doses is likely to compete with other amino acids for passage through the blood-brain barrier, it should not be taken with protein-rich food. Of course, the ZeinPharma® L-Theanine Natural Forte is also suitable for vegetarians and vegans.

High bioavailability

L-theanine is structurally related to L-glutamic acid an amino acid  naturally produced in the body, which plays an important role in the transmission of nerve impulses in the brain.


A recent study indicates that L-theanine is already absorbed through the small intestine within ten to twenty-four minutes, gets into the blood stream, and is directed to the brain. There it passes the blood-brain barrier to the nerve cells and it can quickly unfold its positive effects in the brain.


Additionally, with our L-Theanine Natural Forte capsules, we offer a preparation which is well-tolerated by gastric acid and reaches the small intestine easily and without loss of active ingredient. If you prefer a low dosage, take a look at our L-Theanine 250 mg! (LINK)

5 Reasons for taking L-Theanine Natural Forte:

For the dietary treatment of chronic states of fatigue and stress-related diseasesContains more than 40 % natural L-theanineRapid bioavailabilityAdditional polyphenol content of at least 30 %Suitable for vegetarians and vegans
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