Where to buy L-Tryptophan around the World

"L-Tryptophan is an amino acid (building-block of proteins) that is found all around the world. Most people chose to buy their L-Tryptophan from reputable online vendors who sell their own manufactured L-Tryptophan. This makes the process much easier and is often cheaper than locating other sources of L-Tryptophan supplements. Shipping is easy and effective, too. In this article, we’ll explore where you can buy L-Tryptophan around the world – in the USA, Canada, and Australia. We’ll also look into the foods that contain high concentrations of L-Tryptophan, as well as where you find L-Tryptophan in your body. [caption id=""attachment_1329"" align=""alignright"" width=""640""] You can buy l-tryptophan from the comfort of your home[/caption]

Which foods contain L-Tryptophan?

L-Tryptophan is found in high concentrations in a number of food sources. These include foods that are high in protein like meats, dark leafy green vegetables, nuts, and dairy. According to Self Nutrition, a great resource for nutritional data on foods, the top five food sources of L-Tryptophan are:
  1. Sea lion kidney (Alaska)
  2. Elk (game meat) – cooked and roasted
  3. Raw spirulina (seaweed)
  4. Soy protein isolate
  5. Raw chopped spinach[1]

Where to buy L-Tryptophan in the USA

There are loads of options to buy L-Tryptophan in America. The most common form of L-Tryptophan that you’ll find is L-Tryptophan in a protein shake mix. People looking to build muscle mass or increase their protein intake often take protein shakes that are high in L-Tryptophan.[2] If you’re looking for pure L-Tryptophan, you may need to seek out your local alternative health store. You should be able to find L-Tryptophan in most alternative health stores around the country. [caption id=""attachment_1297"" align=""alignright"" width=""290""] Liftmode's L-tryptophan, 98+% purity[/caption] However, the best way to buy L-Tryptophan is through a reputable online vendor. Buying L-Tryptophan online is a great idea for a number of reasons:
  1. It’s easier – you can buy from the comfort of your home
  2. Delivery time is really fast
  3. You’ll find higher quality and higher purity Tryptophan online
  4. It’s cheaper – health stores have to pay rent and mostly resell L-Tryptophan that was bought wholesale. Many reputable online vendors manufacture their own high-quality L-Tryptophan

Where to buy L-Tryptophan in Australia and Canada

There are a number of online vendors selling L-Tryptophan in both Australia and Canada. These are great sources of L-Tryptophan. However, most of the vendors we looked at were reselling products from various different brands. While this is not necessarily a big issue, it is sometimes nicer to find a good brand that you can trust to deliver the highest quality goods. Liftmode suppliers produce the highest quality and purity l-tryptophan – over 98% purity guaranteed! Sometimes it works out better to pay a slight premium for higher quality goods that are shipped directly from the supplier.  

Where L-Tryptophan is found in your body

[caption id=""attachment_1298"" align=""alignright"" width=""300""] Liftmode's 5-HTP, another potent mood-booster,98+% pure[/caption] L-Tryptophan is an amino acid that is found in a number of foods. Amino acids are the building blocks of proteins. L-Tryptophan is one of a few amino acids and amino acid derivatives that are physiologically active at higher doses.[3] For other great amino acids, check out 5-HTP, a molecule that is produced in your body from L-Tryptophan, or L-theanine, a calming amino acid. L-Tryptophan has to cross the blood-brain barrier to deliver its mood-lifting effects in your brain. Before it can cross the blood-brain barrier, some L-Tryptophan is converted into niacin in your liver.[4] Niacin is an important molecule. So, the places you’ll find the most L-Tryptophan in your body are your liver and your central nervous system, as well as in the building blocks of proteins (in muscles, cells membranes, and tissues).[5]  


In conclusion, L-Tryptophan is a mood-lifting and sleep-enhancing dietary supplement that is found in a number of food sources. It is converted into serotonin both in your central nervous system and in your liver. You can buy L-Tryptophan from alternative health shops or directly from suppliers online. Many US-based online vendors ship overseas, for example to Canada or Australia, for very a reasonable price.    

Medical Disclaimer

Not intended to treat, diagnose, or cure any disease or ailment. Please read and fully understand potential adverse effects before using this product. These statements have not been reviewed by the FDA and are not written by a medical professional. Please consult your doctor before using any supplements, especially if you have any medical conditions.


B.Sc. in Molecular Biology and Biochemistry Researched & written by Tristan and verified by the Liftmode.com Research Team


[1] Foods highest in Tryptophan, Self Nutrition Data, retrieved on 20 October 2016 [2] Effect of dietary tryptophan on muscle, liver and whole-body protein synthesis in weaned piglets: relationship to plasma insulin, NO Cortamira et al., Br J Nutr. 1991 Nov;66(3):423-35. [3] Tryptophan: What Does It Do?, Erik Strand, Psychology Today online, September 2003, reviewed July 2016, retrieved on 20 October 2016 [4] Niacin-Tryptophan Relationships in Man and Niacin Requirement, GA Goldsmith, MA, Am J Clin Nutr September 1958, vol. 6 no. 5 479-486 [5] L-Tryptophan: Basic Metabolic Functions, Behavioral Research and Therapeutic Indications, DM Richard et al., Int J Tryptophan Res. 2009; 2: 45–60, Published online 2009 Mar 23.  "

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