--- product_id: 6839415 title: "Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Tablets" brand: "source naturals" price: "1002373₫" currency: VND in_stock: true reviews_count: 6 category: "Source Naturals" url: https://www.desertcart.vn/products/6839415-source-naturals-l-tryptophan-for-mood-relaxation-and-sleep-500mg store_origin: VN region: Vietnam --- # Supports restful sleep & relaxation 500mg pure L-Tryptophan per tablet Made in USA, cGMP & FDA compliant Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Tablets **Brand:** source naturals **Price:** 1002373₫ **Availability:** ✅ In Stock ## Summary > 🌟 Unlock your best night’s sleep and brightest days with Source Naturals L-Tryptophan! ## Quick Answers - **What is this?** Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Tablets by source naturals - **How much does it cost?** 1002373₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/6839415-source-naturals-l-tryptophan-for-mood-relaxation-and-sleep-500mg) ## 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 - • **Trusted Quality Since 1982:** Over 40 years of proven efficacy and safety, manufactured in the USA under strict FDA cGMP standards. - • **Clean, Allergen-Free Formula:** Free from gluten, soy, dairy, yeast, and artificial additives—perfect for the mindful, health-conscious professional. - • **Clinically Potent 500mg Dose:** Each tablet delivers a powerful 500mg of pure L-Tryptophan, the essential amino acid your body craves for mood and sleep support. - • **Natural Mood & Sleep Enhancer:** Promotes serotonin production naturally to help you unwind, reduce anxiety, and fall asleep faster without grogginess. - • **Flexible Dosing for Your Lifestyle:** Take 1-3 capsules daily, with an extra dose before bed for deep, uninterrupted rest—customize your routine for optimal results. ## Overview Source Naturals L-Tryptophan offers a potent 500mg dose of this essential amino acid per tablet, designed to naturally support mood regulation, relaxation, and restful sleep. Manufactured in the USA under FDA cGMP standards, this allergen-free formula is trusted for over 40 years by health-conscious professionals seeking a clean, effective alternative to synthetic sleep aids. ## Description Buy Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Tablets on desertcart.com ✓ FREE SHIPPING on qualified orders Review: Great sleep aid - The following is JUST my story: Years ago when I couldn't sleep, my mom gave me one of these to help me sleep. I was so impressed with them, and took them very seldom when I couldn't fall asleep on my own, which was rare at that time. Then it was off the market for years. I was pleasantly surprised to see it was available again. I was taking zzzSleep by Nyquil, which is actually an antihistamine, and not all comfortable with an unnatural compound, trying to remove the tranquilizers that would leave me so tired the next day I couldn't wake up. I also didn't like the feeling I would/could become dependent on them. I take enough meds without taking any more than I have to, and have never liked taking ANY of them and have fought it every step of the way. (Of course, and PLEASE, you should always check with your doctor before discontinuuing any meds quickly-especially with tranks, as I have known people that are cursed with seizures for the rest of their life when they suddenly stop taking xanax, for instance.) While I still have my RX for tranquilizers, I have not needed them since I started taking these at bedtime, nor needed the tranks for any panic attacks, as I haven't had any. I started by taking just half of one with my other stuff, and slowly worked myself off of the other as prescribed by my doctor. I currently just take one tablet at bedtime, and I'm asleep within 15 minutes of laying my head on the pillow. I wake up refreshed, and not waking up in the middle of the night. The bottle suggests you take three tablets, which I suggest you work yourself up to and listen to your body always to tell you if something is wrong, and always just change one thing at a time when it comes to meds. However, this is what I DID, I'm not a doctor. I highly recommend this product and am so grateful it's available, and has allowed me to drop not one, but two synthetic, unnatural, compounds with side effects, in exchange for a naturallly occuring, sometimes depleted, and very helpful amino acid. This amino acid helps a number of things to work properly in your body, and I know of no side effects from taking this in addition to what your system produces. Believe me, if any one were going to feel side effects, it would be me. I have the weirdest chemical makeup and intolerance to anything, not going into all that here, but after three weeks with these, I would suspect something would have reared its head. I feel better than I have in years. The daily pain I endure is lessened to a some extent, (any amount of THAT I'll take thanks to my breaking, broken spine)-probably because I'm taking less unnatural chemicals and getting a better nights sleep. Going to sleep at 11pm verses 3 am-getting up at 7am, makes sense to me anyway. (Note: I took tranquilizers at the minimum dosage I could get away with for seven years prior to this stuff to help me sleep-I now take NONE! I was also having TERRIBLE and frightening night paralysis where I stopped breathing and could not move almost every night, from too many depressants in my system. After three weeks I'm pretty sure any "placebo" effect, etc. would have worn off too.) I tend to ramble, so I'm done now. Review: Great product seems to be working well - I've been wondering whether or not the effects I felt after starting to take L-Tryp are just placebo effects but all I can say is that it seems that this has helped immensely in me managing my moods and anxiety and my insomnia is just about gone! I've suffered insomnia for years and even sleeping medication prescribed by my doctors did not help me but after starting to take this, I can fall asleep within minutes. It was a bit weird at first since taking this supplement made me have intense and vivid dreams (after years of never recalling having any dreams) but after a few days, my dreams became less scary and less startling. I usually wake up feeling rather energized when I used to always feel exhausted after even 10 hours of sleep. As for my increased ability to be able to deal with my anxiety, the only thing that I really changed in my life in the past year was starting to take l-tryptophan so I am guessing that sleeping well at night really is helping me deal with my exhausting anxiousness. If I recall correctly, according to studies, it seems that if your goal with taking l-tryptophan is to increase your serotonin production, it's best to take without food or to take with carbohydrates. Proteins should be avoided apparently since proteins introduce your body to other amino acids (such as tyrosine, etc) that compete with one of the enzymes that are involved in serotonin production since these other amino acids usually have a higher affinity for the enzyme than tryptophan does. (Btw, I think numerous studies have found evidence that increase tryptophan intake without increasing the other amino acids that compete with tryptophan does in fact increase serotonin production so I really don't think that taking this supplement to help regulate your moods and some mild depression is quack science). Just be careful if you take SSRIs type antidepressants since I think it is possible for a really high concentration of serotonin to occur if you're also taking l-tryptophan. Anyways, this brand seems pretty good and the suggested amount they wrote in the instructions work well with me. ## Features - The essential amino acid L-tryptophan is the precursor of two natural compounds of great importance.* - Suggested Use: 1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take an additional 3 capsules before bed. - Allergies: Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no preservatives, or artificial color, flavor or fragrance. - Over 40 Years of Trust. Source Naturals was created in 1982 by CEO Ira Goldberg to support each individual's potential to enjoy optimal health. - Manufactured in the USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration (FDA). ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000GFHPNY | | Best Sellers Rank | #61,352 in Health & Household ( See Top 100 in Health & Household ) #2,573 in Blended Vitamin & Mineral Supplements #3,275 in Sales & Deals | | Customer Reviews | 4.4 4.4 out of 5 stars (425) | | Date First Available | November 22, 2004 | | Department | Health and Beauty>Health and Wellness | | Is Discontinued By Manufacturer | No | | Item model number | SN1980 | | Manufacturer | Source Naturals | | Product Dimensions | 1.3 x 1.3 x 1.6 inches; 1.6 ounces | ## Product Details - **Brand:** Source Naturals - **Diet Type:** Vegetarian - **Flavor:** Unflavored - **Item Form:** Tablet - **Item Weight:** 0.1 Pounds - **Item dimensions L x W x H:** 1.3 x 1.3 x 1.6 inches - **Primary Supplement Type:** L-Tryptophan - **Product Benefits:** Sleep Support - **Special Ingredients:** L-Tryptophan - **Unit Count:** 120.0 Count ## Images ![Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Tablets - Image 1](https://m.media-amazon.com/images/I/614lyEAlryL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great sleep aid *by M***D on March 20, 2013* The following is JUST my story: Years ago when I couldn't sleep, my mom gave me one of these to help me sleep. I was so impressed with them, and took them very seldom when I couldn't fall asleep on my own, which was rare at that time. Then it was off the market for years. I was pleasantly surprised to see it was available again. I was taking zzzSleep by Nyquil, which is actually an antihistamine, and not all comfortable with an unnatural compound, trying to remove the tranquilizers that would leave me so tired the next day I couldn't wake up. I also didn't like the feeling I would/could become dependent on them. I take enough meds without taking any more than I have to, and have never liked taking ANY of them and have fought it every step of the way. (Of course, and PLEASE, you should always check with your doctor before discontinuuing any meds quickly-especially with tranks, as I have known people that are cursed with seizures for the rest of their life when they suddenly stop taking xanax, for instance.) While I still have my RX for tranquilizers, I have not needed them since I started taking these at bedtime, nor needed the tranks for any panic attacks, as I haven't had any. I started by taking just half of one with my other stuff, and slowly worked myself off of the other as prescribed by my doctor. I currently just take one tablet at bedtime, and I'm asleep within 15 minutes of laying my head on the pillow. I wake up refreshed, and not waking up in the middle of the night. The bottle suggests you take three tablets, which I suggest you work yourself up to and listen to your body always to tell you if something is wrong, and always just change one thing at a time when it comes to meds. However, this is what I DID, I'm not a doctor. I highly recommend this product and am so grateful it's available, and has allowed me to drop not one, but two synthetic, unnatural, compounds with side effects, in exchange for a naturallly occuring, sometimes depleted, and very helpful amino acid. This amino acid helps a number of things to work properly in your body, and I know of no side effects from taking this in addition to what your system produces. Believe me, if any one were going to feel side effects, it would be me. I have the weirdest chemical makeup and intolerance to anything, not going into all that here, but after three weeks with these, I would suspect something would have reared its head. I feel better than I have in years. The daily pain I endure is lessened to a some extent, (any amount of THAT I'll take thanks to my breaking, broken spine)-probably because I'm taking less unnatural chemicals and getting a better nights sleep. Going to sleep at 11pm verses 3 am-getting up at 7am, makes sense to me anyway. (Note: I took tranquilizers at the minimum dosage I could get away with for seven years prior to this stuff to help me sleep-I now take NONE! I was also having TERRIBLE and frightening night paralysis where I stopped breathing and could not move almost every night, from too many depressants in my system. After three weeks I'm pretty sure any "placebo" effect, etc. would have worn off too.) I tend to ramble, so I'm done now. ### ⭐⭐⭐⭐⭐ Great product seems to be working well *by S***H on September 1, 2013* I've been wondering whether or not the effects I felt after starting to take L-Tryp are just placebo effects but all I can say is that it seems that this has helped immensely in me managing my moods and anxiety and my insomnia is just about gone! I've suffered insomnia for years and even sleeping medication prescribed by my doctors did not help me but after starting to take this, I can fall asleep within minutes. It was a bit weird at first since taking this supplement made me have intense and vivid dreams (after years of never recalling having any dreams) but after a few days, my dreams became less scary and less startling. I usually wake up feeling rather energized when I used to always feel exhausted after even 10 hours of sleep. As for my increased ability to be able to deal with my anxiety, the only thing that I really changed in my life in the past year was starting to take l-tryptophan so I am guessing that sleeping well at night really is helping me deal with my exhausting anxiousness. If I recall correctly, according to studies, it seems that if your goal with taking l-tryptophan is to increase your serotonin production, it's best to take without food or to take with carbohydrates. Proteins should be avoided apparently since proteins introduce your body to other amino acids (such as tyrosine, etc) that compete with one of the enzymes that are involved in serotonin production since these other amino acids usually have a higher affinity for the enzyme than tryptophan does. (Btw, I think numerous studies have found evidence that increase tryptophan intake without increasing the other amino acids that compete with tryptophan does in fact increase serotonin production so I really don't think that taking this supplement to help regulate your moods and some mild depression is quack science). Just be careful if you take SSRIs type antidepressants since I think it is possible for a really high concentration of serotonin to occur if you're also taking l-tryptophan. Anyways, this brand seems pretty good and the suggested amount they wrote in the instructions work well with me. ### ⭐⭐⭐⭐ Seems to work *by R***Y on December 30, 2025* Seems to work as a sleep aid as advertised --- ## 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.vn/products/6839415-source-naturals-l-tryptophan-for-mood-relaxation-and-sleep-500mg](https://www.desertcart.vn/products/6839415-source-naturals-l-tryptophan-for-mood-relaxation-and-sleep-500mg) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-04-26*