Where to buy 5-Hydroxytryptophan for sale online

Online vendors have become a prominent source for individuals looking to buy 5-HTP supplements. These products are readily available for sale on various e-commerce platforms and websites specializing in dietary supplements. Sellers often market 5-HTP as a dietary supplement rather than a designer drug or research chemical, emphasizing its natural origins and potential health benefits.
However, consumers must exercise caution and ensure they purchase 5-HTP from reputable vendors. While it is generally considered safe when used as directed, quality and purity can vary among products and sellers. Responsible buying practices are essential to ensure one obtains a genuine and safe product that aligns with one’s wellness goals.
In summary, the 5-HTP market primarily revolves around its role as a dietary supplement, with numerous sellers offering it for sale online. Consumers should be diligent in selecting trustworthy vendors to reap the potential mood-enhancing and sleep-improving benefits of 5-HTP.


5-Hydroxytryptophan (also referred to as 5-HTP and oxitriptan) is a naturally occurring chemical compound found in the human body, serving as an essential intermediate in the synthesis of serotonin, a neurotransmitter. This information needs a specific source citation.
In the United States, United Kingdom, and Canada, 5-HTP is available as an over-the-counter dietary supplement. It is commonly used for various purposes, including as a potential antidepressant, sleep aid, and appetite suppressant. In certain European countries, it is even marketed as a prescription medication for treating major depression (reference needed).
Moreover, individuals who use substances like MDMA and other serotonin-releasing agents sometimes consume 5-HTP to alleviate the negative after-effects experienced during the substance’s comedown phase. These effects often include anxiety, depression, and cognitive fatigue. Given that MDMA use temporarily depletes serotonin levels and inhibits the enzyme responsible for serotonin production, 5-HTP is believed to expedite serotonin production and potentially reduce recovery time. However, there is ongoing debate and some misinformation regarding its effectiveness for this purpose (citation required).
It’s essential to note that 5-HTP should not be taken until at least 12 hours after the last dose of MDMA, as combining the two substances may lead to dangerously elevated serotonin levels in the brain, potentially resulting in a life-threatening condition known as serotonin syndrome.

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5-Hydroxytryptophan, abbreviated as 5-HTP, is a synthetic indole alkaloid belonging to the tryptamine class of molecules. Tryptamines share a fundamental structure characterized by a bicyclic indole heterocycle linked at R3 to an amino group through an ethyl side chain. In the case of 5-HTP, it is further distinguished by the presence of a hydroxy (OH) functional group at R5 of its indole heterocycle. Additionally, it possesses a propanoic acid group connected to the terminal amine RN of its tryptamine framework.
5-HTP can be regarded as the 5-hydroxy derivative of tryptophan and is commercially available in its levorotary isomer form. This compound contains the core structural elements of serotonin, augmented by the inclusion of a propanoic acid group at RN. Within the body, 5-HTP undergoes metabolic reactions that lead to its conversion into serotonin, a neurotransmitter crucial for various physiological functions.


The psychoactive effects of 5-HTP stem from its ability to increase serotonin production within the central nervous system. 5-HTP undergoes decarboxylation, a process in which it is converted into serotonin, also known as 5-hydroxytryptamine (5-HT). This transformation is facilitated by the enzyme aromatic-L-amino-acid decarboxylase, with the assistance of vitamin B6. Notably, this conversion occurs in both nervous tissue and the liver.
An essential aspect of 5-HTP’s action is its ability to cross the blood-brain barrier, allowing it to reach the central nervous system. In contrast, serotonin (5-HT) itself does not possess this capability, making 5-HTP a crucial precursor for maintaining serotonin levels in the brain.
In cases where there is an excess of 5-HTP, mainly when administered alongside vitamin B6, it is believed to undergo metabolic processes and eventual excretion from the body.

Subjective effects






  • Hallucinations – Auditory hallucinations have been reported on 5-HTP. However, they are rare and only occur at high dosages.


Due to the liver’s conversion of 5-HTP into serotonin, extended usage may pose a significant risk of heart valve disease, attributed to serotonin’s influence on the heart. This effect is believed to stem from the activation of 5-HT2B receptors in cardiac tissue.

There have been concerns about 5-HTP potentially causing eosinophilia-myalgia syndrome (EMS), a serious condition characterized by severe muscle tenderness, myalgia, and blood abnormalities. However, it is essential to note that evidence suggests EMS was likely caused by contaminants present in specific 5-HTP supplements rather than the compound itself.

Dangerous Interactions

While many substances are safe when used independently, they can become hazardous and even life-threatening when combined with others. The list below includes some common potentially dangerous combinations, though it may not encompass all possibilities. Certain combinations may be considered safe in low doses of each substance, yet still increase the risk of severe consequences. Prior to consumption, thorough independent research should always be conducted to ensure the safety of combining two or more substances.

Combinations on this list have the potential to elevate neurotransmitter levels, such as serotonin, to dangerous or fatal levels, leading to a life-threatening condition known as serotonin syndrome:

  • SSRIs: High doses of 5-HTP, when combined with SSRIs (selective serotonin reuptake inhibitors), can induce acute serotonin syndrome in rats.
  • SNRIs
  • Serotonin-releasing agents like MDMA, 4-FA, MDAI, and αMT: To prevent serotonin syndrome, it is advisable to take 5-HTP only after the user has come down from substances like MDMA, typically around 12 hours after the last dose.
  • MAOIs, including Syrian rue, banisteriopsis caapi, 2C-T-2, 2C-T-7, αMT, and certain antidepressants: High doses of 5-HTP, when combined with MAOIs (monoamine oxidase inhibitors), can lead to acute serotonin syndrome in rats.
  • Tricyclic antidepressants (TCAs)
  • Tramadol

Legal status

5-HTP is readily available as an over-the-counter dietary supplement in the United States, United Kingdom, Canada, and most European countries. It is not subject to any illicit substance control regulations.

In specific regions of Europe, where it is prescribed as an antidepressant, there might be some restrictions on its sale and distribution.


1. What is 5-Hydroxytryptophan (5-HTP)?

  • 5-Hydroxytryptophan is a naturally occurring amino acid and a precursor to serotonin, a neurotransmitter associated with mood regulation and other physiological functions.

2. How is 5-HTP obtained?

  • 5-HTP supplements are typically derived from the seeds of the Griffonia simplicifolia plant. It can also be synthesized in a laboratory.

3. What is the everyday use of 5-HTP?

  • 5-HTP is often used as a dietary supplement to improve mood, sleep quality, and appetite control potentially. It is sometimes considered an alternative to traditional antidepressant medications.

4. Can 5-HTP be purchased over the counter?

  • Yes, 5-HTP is available as an over-the-counter dietary supplement in many countries, including the United States, the United Kingdom, Canada, and most of Europe.

5. Are there any potential side effects of 5-HTP?

  • While 5-HTP is generally considered safe, some individuals may experience mild side effects such as nausea, digestive discomfort, or dizziness, especially at higher dosages.

6. What is the recommended dosage of 5-HTP?

  • The appropriate dosage of 5-HTP can vary from person to person. It’s advisable to start with a lower dose and gradually increase it if needed, following the manufacturer’s guidelines.

7. Can 5-HTP interact with medications?

  • 5-HTP may interact with certain medications, especially those that affect serotonin levels, such as antidepressants. Consult with a healthcare professional before using 5-HTP if you are taking prescription medications.

8. How long does it take for 5-HTP to show effects?

  • The time it takes to notice the effects of 5-HTP can vary among individuals. Some may experience improvements in mood or sleep within a few weeks, while others may take longer.

9. Can 5-HTP be used to treat depression?

  • 5-HTP is sometimes used as a natural remedy for managing symptoms of depression. However, it should not replace prescribed antidepressant medications without consulting a healthcare provider.

10. Are there any precautions when taking 5-HTP?

  • It’s important to follow recommended dosages and consult with a healthcare professional, especially if you are pregnant, nursing, have a medical condition or are taking other medications. Avoid combining 5-HTP with substances that affect serotonin levels without medical guidance to prevent serotonin syndrome.


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6. Nakatani, Y., Sato-Suzuki, I., Tsujino, N., Nakasato, A., Seki, Y., Fumoto, M., Arita, H. (May 2008). “Enhanced brain 5-HT crosses the blood-brain barrier through the 5-HT transporter in rats”. The European Journal of Neuroscience. 27 (9): 2466–2472. doi:10.1111/j.1460-9568.2008.06201.x. ISSN 1460-9568.

7. Bouchard, S., Roberge, A. G. (1 July 1979). “Biochemical properties and kinetic parameters of dihydroxyphenyialanine – 5-hydroxytryptophan decarboxylase in the brain, liver, and adrenals of cats”. Canadian Journal of Biochemistry. 57 (7): 1014–1018. doi:10.1139/o79-126. ISSN 0008-4018.

8. Amamoto, T., Sarai, K. (September 1976). “On the tryptophan-serotonin metabolism in manic-depressive disorders. Changes in plasma 5-HT and 5-HIAA levels and urinary 5-HIAA excretion following oral loading of L-5HTP in patients with depression”. Hiroshima Journal of Medical Sciences. 25 (2–3): 135–140. ISSN 0018-2052.

9. Gustafsson, B. I., Tømmerås, K., Nordrum, I., Loennechen, J. P., Brunsvik, A., Solligård, E., Fossmark, R., Bakke, I., Syversen, U., Waldum, H. (29 March 2005). “Prolonged serotonin administration induces heart valve disease in rats”. Circulation. 111 (12): 1517–1522. doi:10.1161/01.CIR.0000159356.42064.48. ISSN 1524-4539.

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