--- product_id: 429325575 title: "Source Naturals - L-Tryptophan 500 Mg. 60 Capsules 67756" brand: "source naturals" price: "€ 66.66" currency: EUR in_stock: true reviews_count: 5 category: "Source Naturals" url: https://www.desertcart.hr/products/429325575-source-naturals-l-tryptophan-500-mg-60-capsules-67756 store_origin: HR region: Croatia --- # Supports restful sleep & circadian rhythm 500 mg pure L-Tryptophan per capsule Boosts serotonin & melatonin synthesis Source Naturals - L-Tryptophan 500 Mg. 60 Capsules 67756 **Brand:** source naturals **Price:** € 66.66 **Availability:** ✅ In Stock ## Summary > 🌟 Unlock your calm: Sleep, mood, and immunity in one capsule! ## Quick Answers - **What is this?** Source Naturals - L-Tryptophan 500 Mg. 60 Capsules 67756 by source naturals - **How much does it cost?** € 66.66 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/429325575-source-naturals-l-tryptophan-500-mg-60-capsules-67756) ## Best For - source naturals enthusiasts ## Why This Product - Trusted source naturals brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sleep Like a Pro:** Enhances natural melatonin production for deep, restorative sleep - • **Mood & Stress Balance:** Elevates serotonin levels to reduce anxiety and promote calm - • **Clean & Trusted Formula:** Gluten-free, dairy-free, soy-free, and rigorously tested for purity - • **Pure 500 mg L-Tryptophan:** Clinically potent dose for mood & relaxation support - • **Immune & Metabolic Support:** Precursor to kynurenines and niacin for immunity & metabolism ## Overview Source Naturals L-Tryptophan delivers a pure 500 mg dose of this essential amino acid per capsule, scientifically designed to support relaxation, mood stabilization, and restful sleep by boosting serotonin and melatonin synthesis. This gluten-free, allergen-free supplement also aids immune function and metabolism, making it a holistic choice for busy professionals seeking natural stress relief and better sleep quality. ## Description The essential amino acid L-tryptophan helps support relaxation, restful sleep, and positive mood. It plays a part in the synthesis of both melatonin and serotonin, hormones involved with mood and stress response and sleep/wake cycles. L-Tryptophan also supports immune functions because it is the body's precursor to the kynurenines that regulate immunity. If needed, L-tryptophan converts to niacin in the body, which supports circulation, a healthy nervous system, the metabolism of food, and the production of hydrochloric acid for the digestive system. Source Naturals L-Tryptophan is extremely pure and is regularly tested to ensure the highest standards of quality. Suggested Use: 1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 capsules before bed. If you have any questions please contact our in-house customer support team. Review: I know that's a funny title, but seriously, how the hell did I not??? I was a child with OCD and I have been an adult with OCD and anxiety. I'm also sort of a naturalist and very anti-pharmaceutical. I don't care what anyone says, but this country is driven by "quick fixes" and "happy pills," which of course NEVER solve the problem. I can honestly say that this supplement has saved me in every way that I needed to be saved. I could not for the life of me figure out why my anxiety got worse as an adult where I started having panic attacks and then fearing that I would have panic attacks which brought on more panic attacks. I won't be a hypocrite. I have a script for Xanax but I RARELY take it. When used on occasion, it is a brilliant med, but I don't want to need to take it. I first tried 5-HTP and I'm a very happy person so when I started getting really agitated, I knew something was weird. Then, I read a bunch of reviews where you aren't supposed to drink within 6 hours of taking it and you shouldn't take Ibuprofen. So, essentially, you aren't supposed to live a real life or get cramps or headaches because just have to suffer through them. If I received major benefit from it, I would have gone ahead and taken it. After getting moody, I look again at the reviews for L-Tryptophan. I can honestly say that this has CHANGED ME! No more panic. Sleeping amazingly. I'm not stressed. I hardly have any anxiety. Where have you been all my life, L-Tryp... seriously??? I have friends that are on SSRI's AND Benzos daily and they STILL have panic attacks. If ALL of that medication isn't at least getting rid of your issues, why the hell would you continue to take it and say to yourself, "This seems very wrong..." After having anxiety daily and panic attacks often and literally beginning to question doing things because I didn't want to have panic, I knew that I needed to find SOMETHING to help me or I would literally be nuts by the time I was 40. Friends, this seriously have saved me. I have tried a LOT of stuff (I mean A LOT), but in getting to the root of my stuff (OCD/anxiety), I figured that low serotonin was the bottom line. It would seem then that raising my serotonin levels naturally would be key. I cannot say enough how amazing this product has been. I wish I could give it 10 stars and an Academy Award! Thank you, Source Naturals for making an excellent product. I will be buying a lifetime supply! UPDATE: it's over a month later and I haven't had a panic attack or taken Xanax once!! I think it's a combo of working with your thoughts as well but I really do believe in this product. Review: Helps me sleep at night & be nice throughout day: i take 2 at daytime to balance my mood (this makes me lead from my heart instead of from my critical brain); at bedtime take 3. This is the same as 5HTP! But less expensive. ## Features - manufacturer: Source Naturals - Item Trademark: SOURCE NATURALS - Item Weight: pounds, pounds, 0.1, 0.1 - Item Category: Nutritional Supplement ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000GFSVS2 | | ASIN | B000GFSVS2 | | Age Range Description | Adult | | Allergen Information | Dairy Free, Egg Free, Gluten Free, Soy Free, Wheat Free | | Best Sellers Rank | #93,875 in Health ( See Top 100 in Health ) #2,500 in Multivitamins Nutritional Supplements | | Brand Name | Source Naturals | | Color | No Color | | Container Type | Canister | | Customer Reviews | 4.5 4.5 out of 5 stars (1,567) | | Customer reviews | 4.5 4.5 out of 5 stars (1,567) | | Diet Type | Gluten Free | | Dosage Form | Capsule | | Flavor | Unflavored | | Global Trade Identification Number | 00021078019855 | | Is Discontinued By Manufacturer | No | | Item Dimensions | 6.4 x 6.4 x 11.7 centimeters | | Item Form | Capsule | | Item Weight | 45 g | | Item model number | SN1985 | | Manufacturer | Source Naturals | | Manufacturer | Source Naturals | | Manufacturer Part Number | SN1985 | | Material Features | Food Safe | | Material Type Free | en_AE | | Model Name | SN1985 | | Model Number | SN1985 | | Number of Items | 1 | | Primary Supplement Type | L-Tryptophan | | Product Benefits | Restful Sleep,Support | | Product Dimensions | 6.38 x 6.38 x 11.68 cm; 45.36 g | | Special Ingredients | L-Tryptophan | | Specific Uses For Product | Laboratory | | Total Servings Per Container | 40.0 | | UPC | 021078019855 | | Unit Count | 60.0 Count | ## Product Details - **Brand:** Source Naturals - **Diet type:** Gluten Free - **Flavour:** Unflavored - **Item dimensions L x W x H:** 6.4 x 6.4 x 11.7 centimeters - **Item form:** Capsule - **Item weight:** 45 g - **Primary supplement type:** L-Tryptophan - **Product benefits:** Restful Sleep,Support - **Special ingredients:** L-Tryptophan - **Unit count:** 60.0 Count ## Images ![Source Naturals - L-Tryptophan 500 Mg. 60 Capsules 67756 - Image 1](https://m.media-amazon.com/images/I/71VMT7Lk+EL.jpg) ## Questions & Answers **Q: How many milligrams per tablet?** A: 500mg each. I typically only need 1. Remember these tips for use. This is a protein precursor so you will not show much affect if you have eaten protein recently. Eat dinner a few hours before bed, and take the Tryptophan about 30 minutes before you need to sleep. This like all amino acids function much better when you add a B-Vitamin complex to it as a transport mechanism. **Q: Why is their no indication of the source of this tryptophan? Where does it come from?** A: I need to know the source also. I had been taking 5-HTP, but my body can't tolerate it. 5-HTP is made from an African legume, and I've noticed that legumes cause fibro-like inflammation in my muscles. (My father had gout. I don't have the gout, but I can't tolerate anything derived from a bean.) From time to time, I have had problems with certain supplements. Knowing the source before I buy is a necessary thing for me also. **Q: What is listed as "other ingredients"?** A: Other Ingredients: gelatin (capsule), dibasic calcium phosphate, mycrocrystaline cellulose, silica, and magnesium stearate. Also, listed with the L-Tryptophan is Iron (naturally occurring) 575 mcg which it indicates is 3%DV of daily need. But the DV is according to the FDA I'm sure. After my husband passed away, I found some of this in his things. I took some and found it helped me get through this and also get sleep at night. **Q: What is the source of the dextrose used for this tryptophane? Is it made in China?** A: As you can see from the company, their ingredients are sourced from China. Kudos to them for being honest. Unfortunately, beets and corn, especially from China, are GMO. No thanks. The search for a company that puts consumer health over profit goes on! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by K***. on 30 January 2014* I know that's a funny title, but seriously, how the hell did I not??? I was a child with OCD and I have been an adult with OCD and anxiety. I'm also sort of a naturalist and very anti-pharmaceutical. I don't care what anyone says, but this country is driven by "quick fixes" and "happy pills," which of course NEVER solve the problem. I can honestly say that this supplement has saved me in every way that I needed to be saved. I could not for the life of me figure out why my anxiety got worse as an adult where I started having panic attacks and then fearing that I would have panic attacks which brought on more panic attacks. I won't be a hypocrite. I have a script for Xanax but I RARELY take it. When used on occasion, it is a brilliant med, but I don't want to need to take it. I first tried 5-HTP and I'm a very happy person so when I started getting really agitated, I knew something was weird. Then, I read a bunch of reviews where you aren't supposed to drink within 6 hours of taking it and you shouldn't take Ibuprofen. So, essentially, you aren't supposed to live a real life or get cramps or headaches because just have to suffer through them. If I received major benefit from it, I would have gone ahead and taken it. After getting moody, I look again at the reviews for L-Tryptophan. I can honestly say that this has CHANGED ME! No more panic. Sleeping amazingly. I'm not stressed. I hardly have any anxiety. Where have you been all my life, L-Tryp... seriously??? I have friends that are on SSRI's AND Benzos daily and they STILL have panic attacks. If ALL of that medication isn't at least getting rid of your issues, why the hell would you continue to take it and say to yourself, "This seems very wrong..." After having anxiety daily and panic attacks often and literally beginning to question doing things because I didn't want to have panic, I knew that I needed to find SOMETHING to help me or I would literally be nuts by the time I was 40. Friends, this seriously have saved me. I have tried a LOT of stuff (I mean A LOT), but in getting to the root of my stuff (OCD/anxiety), I figured that low serotonin was the bottom line. It would seem then that raising my serotonin levels naturally would be key. I cannot say enough how amazing this product has been. I wish I could give it 10 stars and an Academy Award! Thank you, Source Naturals for making an excellent product. I will be buying a lifetime supply! UPDATE: it's over a month later and I haven't had a panic attack or taken Xanax once!! I think it's a combo of working with your thoughts as well but I really do believe in this product. ### ⭐⭐⭐⭐⭐ Review *by R***E on 11 February 2026* Helps me sleep at night & be nice throughout day: i take 2 at daytime to balance my mood (this makes me lead from my heart instead of from my critical brain); at bedtime take 3. This is the same as 5HTP! But less expensive. ### ⭐⭐⭐⭐⭐ Review *by M***E on 17 May 2014* I have done a serious study of supplements. L-Tryptophan is an essential amino acid for humans. Essential means that the body does not make it and it has to come from food. Amino Acids are the building blocks of proteins. To make protein we need amino acids. The 'L' in L-Tryptophan stands for the Latin 'Levo' or Left as opposed to Dextro for Right. L-Tryptophan means Left-Tryptophan as its molecular structure has something to do with left. Not relevant in here, except to note that L-Tryptophan is better absorbed in the human body than Tryptophan. We do not get enough Tryptophan in our diet, so supplements are essential. Eating more turkey is still not enough. Typically taken at nighttime for good sleep. Source Naturals is a very good vitamin manufacturer, and to be trusted. L-Tryptophan balances the brain chemicals, and it is my belief from my reading and study that a lot of anxiety, bi-polar disorders, and such can be alleviated or perhaps cured in the long run with use of this supplement. It can be taken in small doses during daytime too, but does make you a bit drowsy. Not like a sleeping pill, this is more natural. Lack of Tryptophan in the body has bad consequences long term. I have found that my sleep becomes deep and restful with use. I take 2 of these capsules 30 minutes before bedtime. I also occasionally use 3 mg of Melatonin (Ultra Melatonin from Costco is best), which replenishes missing Melatonin due to age. Melatonin is a super hormone triggering the release of a lot of other hormones in the body and very necessary to push back the decay and 'aging' of the human body. Also helps reset your bio-clock from travel or bad sleep habits, and makes the body youthful. If you are over 40 you need to get some of this. If you know of ADHD kids, schizophrenics, bi-polar people, depressives, anxiety prone people, advise them to take some too. It may have amazing results on them. I am not a doctor, but passing on my experience and study to others. Please rely on your doctor's medical advice in all matters, however, note that doctors in the US do not get a single course on nutrition or holistic health in their entire course of study, so many of them do not know how to boost the body naturally or diagnose deficiencies in the body. Drugs are not always the long term solution. ## Frequently Bought Together - Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Capsules - NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules - NOW Foods Supplements, L-Tyrosine 500 mg, Supports Mental Alertness*, Neurotransmitter Support*, 120 Capsules --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/429325575-source-naturals-l-tryptophan-500-mg-60-capsules-67756](https://www.desertcart.hr/products/429325575-source-naturals-l-tryptophan-500-mg-60-capsules-67756) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-04-24*