Your One-Stop Bulk Powder Supplier

Nutri Avenue Inc


Product Name L-tryptophan Bulk Powder
Other names Tryptophan, L Tryptophan Ratiopharm, Levotryptophan, Tryptan, and L-Tryptophane.
CAS number 73-22-3
Molecular Formula C11H12N2O2
Molecular Weight 204.22 g/mol
Specifications 99%
Appearance/color White crystal or powder
Benefits For positive mood, relaxation, enhanced sleep
Applications Dietary supplements
Package 1kg, 25kg/drum


Get a Free Quote

L-Tryptophan is a very effective agent for positive mood and relaxation. It is widely used in dietary supplement production as it improves neurotransmitter balance and optimizes brain function. The compound is also claimed to help prevent and treat various mood-associated health conditions.

What is L-Tryptophan?

L-Tryptophan is the L-enantiomer of the naturally occurring compound Tryptophan. It is an essential amino acid that serves a vital role in the human body as a precursor to the production of the neurotransmitter serotonin. As an essential amino acid, L-Tryptophan is not produced in the body and must be supplemented through food and other dietary sources. Therefore, L-Tryptophan is classified as a nutraceutical, a micronutrient, and an anti-depressant agent.

L-Tryptophan C11H12N2O2

L-Tryptophan is further identified as having CAS number 73-22-3 and molecular formula C11H12N2O2. Its molecular weight is 204.22 g/mol. Other names used to identify the product include Tryptophan, L Tryptophan Ratiopharm, Levotryptophan, Tryptan, and L-Tryptophane.

Generally, the said compound has a flat taste and a white crystal or powder appearance. It is also soluble in water.

L-Tryptophan powder is available for wholesale purchase at Nutriavenue. It is usually packed in paper drums with two layers of poly bags inside, each paper drum weighing twenty-five kilograms. Different packaging materials may be used upon request of customers.

L-Tryptophan Specifications

The most common form of L-Tryptophan powder is 99% fermented L-tryptophan powder. The said product is available for purchase at Nutriavenue. When you buy the product from us, you may avail of shipping services through the air, sea, or couriers like UPS or FedEx for your convenience. The shipping rates vary.

L-Tryptophan vs. 5-HTP

5 HTP C11H12N2O3Also known as 5-hydroxytryptophan, 5-HTP is an amino acid naturally occurring in the human body. Just like the compound L-Tryptophan, 5-HTP acts as a precursor to the production of the neurotransmitter serotonin. It is described as having CAS number 4350-09-8 and molecular formula C11H12N2O3. The molecular weight of the compound is 220.23 g/mol.

While both L-Tryptophan and 5-HTP are useful in promoting sleep and relieving anxiety, the majority of experts still recommend the use of the former as it has been studied for longer periods.

Also, while the ability of 5-HTP to cross the blood-brain barrier is often recognized as an advantage, it has been shown in limited studies that this benefit may have certain negative effects on other neurotransmitters and affect other vital functions of the brain. Thus, it is still better to use L-Tryptophan for both sleep and anxiety.

L-Tryptophan vs Melatonin

The compound Melatonin is a hormone produced by the human body to regulate the sleep-wake pattern. It is manufactured synthetically and used by individuals suffering from sleep disorders such as insomnia. The CAS number of Melatonin is 73-31-4, and its molecular formula is C13H16N2O2. Its molecular weight is 232.28 g/mol.

Both L-Tryptophan and Melatonin are used to formulate dietary supplement products to promote rest and sleep. However, while the basic function of Melatonin is only primarily advocated as an ingredient for sleep, L-Tryptophan is believed to provide many other functions, including the control of symptoms of depression.

Both of the compounds are also popular in many sleep-enhancing products. However, L-Tryptophan is more common and popular in the market due to its vast benefits among individual users.

While some experts say no interactions may occur when L-Tryptophan is combined with Melatonin, some researchers suggest that the said compounds may have potential drug interactions. Hence, users should be advised to consult their physicians before using a combination of L-Tryptophan and Melatonin.

How does L-Tryptophan Work?

L-Tryptophan mainly works by enhancing the production of the neurotransmitter Serotonin in the brain. This neurotransmitter is important in regulating mood, emotions, appetite, and digestion. In addition, Serotonin also serves as a precursor to the production of the hormone Melatonin which is important in sleep-wake pattern regulation. Thus, by supporting Serotonin production in the brain, L-Tryptophan helps enhance mood, emotions, appetite, digestion, and even sleeping patterns.

L-Tryptophan Manufacturing Process

Like many other L-amino acids, L-Tryptophan is industrially produced through microbial fermentation using microorganisms belonging to the genus Plebipacterium, Corynepacterium, Escherichia, and the like as raw materials. Procedures involved in the said production process include culturing the bacteria, producing and accumulating L-tryptophan amino acids in the medium, and after that collecting the L-Tryptophan amino acid.

L-Tryptophan Health Benefits

The following are some benefits of using the compound L-Tryptophan:

  • For positive mood

As a serotonin and melatonin precursor, the benefits of using L-Tryptophan in encouraging positive mood have long been established. The compound is also believed to enhance immunity and promote an overall sense of well-being.

Many physicians recommend using L-Tryptophan among depressive patients as it is shown to improve overall mood through its serotonin-enhancing effects.

L-tryptophan for positive mood

  • Support relaxation

The compound is also believed to promote relaxation and relieve anxiety. Thus, it is generally beneficial for adults who are exposed to high levels of stress.

L-tryptophan relax NutriAvenue

  • Promote restful sleep

L-Tryptophan may also promote restful sleep as it helps enhance melatonin production.

l-tryptophan good for sleep

L-Tryptophan Side Effects

L-Tryptophan is not associated with any severe side effects when taken within recommended doses. However, users may experience mild side effects, including headaches and some gastrointestinal discomforts. Severe adverse reactions are not commonly expected and should be dealt with by discontinuing the use of the product and seeking immediate medical advice.

L-Tryptophan Dosage

Adults may safely take 8 to 12 grams of the compound per day. Nevertheless, physicians may prescribe a different dosage depending on the individual user’s weight, age, and overall physical condition.

L-Tryptophan Price

Manufacturers usually sell L-Tryptophan powder at prices ranging from USD 20/kg to USD 25/kg .

At Nutriavenue, we offer free samples for our customers if they wish to check out the product quality and purity before purchasing. We also offer bulk pricing for customers availing of wholesale purchases.

You may request a quotation upon a specific quantity or specification by contacting our technical support staff.

Where to Buy L-Tryptophan Powder in Bulk?

Nutriavenue is among the top affordable and high-quality L-Tryptophan powder sources in bulk. We are duly registered as an ingredient supplier with the FDA, and we are also recognized by entities like Kosher, Halal, and GMP. We have factories across the US and have large stock for many of our products.

With our free sample offer, you will surely be at an advantage when choosing our company.

You can know more about our products and services by emailing or contacting our technical support staff.


Bulk raw Ingredients Supplier

Nutri Avenue

Leave your details below, and let us help you get fresh, high-quality ingredients ASAP.

Nutri Avenue

how can we help ?