L-Tryptophan 500 mg (45 Capsules)

€12.71 *

Available for prompt delivery; Delivery time: approx. 3 – 4 weekdays

27 Stück (€47.07 * / 100 Stück)

Prices incl. VAT plus shipping costs

  • gluten-free
  • GMO-free
  • lactose-free
  • soya-free
  • vegan
  • without artificial colouring
  • without artificial flavors
  • without preservatives

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Art-No. 12737
PZN: 09542731
EAN 4260085383177
Packing size: 45 capsules
Capsule shell type: Vegetarian capsule shell

Take 1 - 2 capsules unchewed daily before going to bed with non-carbonated water (at least 200 ml). L-tryptophan capsules are to be kept out of the reach of children. Do not take L-tryptophan together with other substances like 5-HTP or medicaments that also influence the serotonin level.

Ingredients: L-tryptophan, hydroxypropylmethylcellulose (capsule).
Active content: L-tryptophan per 2 capsules contain: 1000 mg

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Look here for the current customer information and test report for all our products of an independent German laboratory and convince yourself of the safety. All ZeinPharma products are regularly tested by independent laboratories for micro-organisms to ensure you an all-round, safe product.

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L-Tryptophan 500mg

With the natural L-tryptophan from ZeinPharma® you get a dietetic food for diet management of sleep disorders in highest quality.


     For diet management of sleep disorders

     Produced through natural fermentation

     500 mg per 1 capsule

     Essential amino-acid

     100 % vegetarian

The path of L-tryptophan in the body

L-tryptophan is converted into serotonin by your body. as soon as it enters your brain after consumption. Those who have enough serotonin in the body, the brain allows a transformation of this serotonin to melatonin, which is colloquially called "sleep hormone".

The pineal gland in the brain forms melatonin in the dark. Melatonin hence contributes to the preparation of the body to the sleep phase, and thus influences the day-night rhythm.

L-Tryptophan is essential

The L-Tryptophan capsules provide your body with the essential amino acid in high dosage. The body cannot form it on its own, and yet it is needed by everyone. The amino acid L-tryptophan is thus an essential amino acid, which you must actively supply to your body from the outside.

Your body generally uses the amino acids to produce proteins, which perform a variety of tasks and functions. Along with transport proteins, there are, for example, tehe so-called structural proteins. Amino acids are decomposed and rebuilt in the body also with the aim to further build other endogenous substances.

Enjoy a healthy sleep

Your body needs enough sleep. During the sleeping-resting phase, the regeneration of your body takes place, giving you the necessary energy for the following day. How much sleep a person exactly needs is very individual. On average, the required sleep duration is around six to nine hours a day.

Independent of the number of hours you need: always avoid to fall below your individual sleep. Whoever does not get enough sleep on a regular basis, often feels weak and without energy.

Sleep disorders are common

You suffer from chronic sleep disorder, if you do not sleep continuously or restoratively for more than one month in three or more nights per week, and as a result you experience fatigue or irritability. If you suffer from these symptoms, you are by far not the only one, since in Germany in terms of sleep disorders there is an affected population by about 30 percent.

Lack of sleep and its consequences

Do you feel exhaustion and inability to concentrate? Even the morning look in the mirror may shock you with deep dark circles. You have decided to go to sleep as early as possible, however something important has come between you. You may also have gone to bed early, but you have not come to a good rest, because you are worried about something and in the evening you cannot turn off worrying thoughts. No matter which scenario is the cause of your lack of sleep, the consequences remain unpleasant at any case.

L-Tryptophan is confirmed by studies

With L-Tryptophan you get a dietary food that has been tested in studies, which prove the sleep-promoting properties of the essential amino acid.

In fact, L-tryptophan is converted in the body into serotonin, which is the starting substance for the sleep-inducing hormone melatonin. Take two capsules containing a total of 1000 milligrams of the essential amino acid L-tryptophae, approximately half an hour before sleeping, in order to treat sleep disorders effectively.

1,000 mg of L-tryptophan are sufficient

In order to treat sleep disorders dietetically, you will need 2 capsules of L-Tryptophan ZeinPharma per day. Two capsules of ZeinPharma® L-Tryptophan contain 1000 milligrams of the essential amino acid.

Reaching the same amount with food would be a challenge. You would have to eat about 170 grams of soybeans, 600 grams of walnuts, drink two liters of cow's milk with 3.8 percent fat or you would need to consume about one kilogram of unpeeled rice.

Carbohydrates increase the uptake of L-tryptophan

A valuable tip is to consume a carbohydrate-rich snack or drink, such as fruit juice, together with the L-tryptophan capsules. This may help in the uptake of L-tryptophan in the brain.


Avoid protein-rich meals or L-tryptophan intake, because these inhibit the uptake of L-tryptophan into the brain. Every protein is composed of amino acids, into which they are decomposed during digestion. When these amino acids reach the blood-brain barrier at the same time as L-tryptophan, the individual amino acids compete with each other. As a result, your brain absorbs less L-tryptophan, the more amino acids are in total in your blood.

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