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  • NOW Foods L-Tryptophan 500mg, 120 Vcaps
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NOW Foods L-Tryptophan 500mg, 120 Vcaps

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List Price: $39.99
Price: $21.49 ($0.18 / Count) & FREE Shipping on orders over $35. Details
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Sold by Remedy Central and Fulfilled by Amazon. Gift-wrap available.
120
  • Supports Relaxation and Promotes Restful Sleep*
  • Pharmaceutical Grade (USP)
  • Encourages Positive Mood

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Frequently Bought Together

NOW Foods L-Tryptophan 500mg, 120 Vcaps + Now Foods L-Tyrosine 500mg, 120-Capsules + NOW Foods 5-HTP 100mg, 120 VCaps
Price for all three: $48.17

Buy the selected items together


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Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. Please see our full disclaimer below.

Product Description

Size: 120

L-Tryptophan is an essential amino acid important in human nutrition for the synthesis of melatonin and serotonin, hormones regulating mood and synthesis of melatonin and serotonin, hormones regulating mood and stress response.  L-Tryptophan helps support relaxation, sleep, positive mood and immune function.*  As an essential amino acid, it is not synthesized by the body and must be obtained from the diet.  NOW® L-Tryptophan is pharmaceutically pure - every lot is tested to be free of Peak E and microbial contamination.

Product Details

Size: 120
  • Product Dimensions: 6 x 5 x 4 inches ; 4.8 ounces
  • Shipping Weight: 4.8 ounces (View shipping rates and policies)
  • Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B0019LWV56
  • UPC: 733739001672
  • Item model number: 18847
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (148 customer reviews)
  • Amazon Best Sellers Rank: #3,663 in Health & Personal Care (See Top 100 in Health & Personal Care)
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Customer Questions & Answers

Customer Reviews

A quality product at an unbelievable value.
JOHN A ALMADA
When I wake up I feel fully refreshed and ready to go, no groggy feeling you get with a lot of other sleep aids.
Chris F
I find these to really help me getting to sleep and getting a good nights rest.
Dave Readers

Most Helpful Customer Reviews

104 of 108 people found the following review helpful By Amazon Enthusiast TOP 500 REVIEWER on June 14, 2011
Size Name: 120 Verified Purchase
This is an excellent value for a superior form of Pharmaceutical Grade L-Tryptophan. This amino acid is a superb sleep aid (usual dose for sleep would be 1500 mg, or 3 of these capsules, taken on an EMPTY stomach, at least an hour and a half after eating, with water or a small bit of fruit juice). Never combine any amino acid with any protein-containing food or drink (like milk) or you're just wasting your money.

L-Tryptophan helps raise serotonin levels in the brain, leading to better sleep, less anxiety, higher emotional resilience, more relaxation, and better mood. It can be taken in a lower dose during the day, if needed for these effects (a single capsule).

I've also used Source Naturals L-Tryptophan 500mg, 120 Capsules with great success, but I actually think NOW's brand works just a bit better for me (I sleep a little deeper). Costs a bit more, but worth it--enthusiastically recommended!

P.S. Anyone on any type of antidepressant medications MUST talk to their doctor before taking tryptophan. Also, exercise caution if you're taking St. Johns Wort--Google "Serotonin syndrome" for more info. Always thoroughly research your supplements for possible interactions before taking anything. Sweet dreams!
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67 of 70 people found the following review helpful By Never Smile at Strangers on March 8, 2012
Size Name: 120 Verified Purchase
I can't praise this L-Tryptophan highly enough. I've been on and off of prescription anti-depressants my entire adult life, but for the first time I feel as though my brain chemistry is actually "normal." I feel happy and WELL for the very first time. I even have NATURAL energy versus needing to turn to caffeine all day.

If you suffer from depression, I HIGHLY recommend that you try this and also get Julia Ross's "The Mood Cure." In it she explains why most depression sufferers benefit from this amino as well as many of the others, like GABA and DLPA. Since beginning a regimen of the three--and L-Tyrosine--I've felt better than ever.
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25 of 26 people found the following review helpful By Intelligent Researcher on October 24, 2013
Size Name: 120 Verified Purchase
First let me say that I am a healthcare professional and unlike my colleagues, whenever possible I prefer Natural Supplements to Rx Drugs.
This product and/or its metabolite 5-htp was recommended to me to treat insomnia by a friend who is also an M.D. (Neurology & Psychiatry) and also an expert in treating various medical conditions with Natural products vs. Prescription Drugs. L-Tryptophan is not habit forming and can also be used to treat some (but not all ) forms of depression. If you are going through a lot of stress and your mind is keeping you awake, this product works even better when taken with Source Naturals THEANINE SERINE and NOW St. Johns Wort. As with all supplements and Rx Drugs, I do not believe that the correct dose is the same for everyone. In my opinion the correct dose for any drug or supplement is the smallest dose that gives you results. As always,you must seek the advice of a qualified physician who has experience prescribing both natural supplements & prescription drugs before taking any supplements unless you are 100% sure that the combination of Rx drugs and/or Natural Supplements that you are taking is 100% safe (or that you understand the risks)for your particular body.
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16 of 17 people found the following review helpful By Chris F on October 22, 2013
Size Name: 120 Verified Purchase
I recently added L-Tryptophan to my sleeping aid cocktail, and it's been amazing. The main benefit I've noticed since I started taking L-Tryptophan is when I wake up now (be it after 4, 6, or 8 hours of sleep) I feel instantly awake and ready to go. It's interesting to feel fully refreshed after 4hrs of sleep, something I haven't felt since I was younger. Although it may not last throughout the day, but I believe it's a good indication of how well this medication is working. The addition of L-Tryptophan also makes me more tired and helps me actually fall asleep moreso then any one thing I take.

I've suffered from insomnia since I can remember, even if I want to sleep and am trying - my brain is simply too active to let me sleep at night. I took ambien for a short time and it was one of the worst medication experiences I've had. So have been experimenting with different combinations of OTC sleep aids the past couple years. My currently nightly ritual (unless I'm somehow tired already) is :
1-2x Nature's Bounty Melatonin, 3 mg, 240 Tablets
1x Doctor's Best Suntheanine L-Theanine (150mg) Vegetable Capsules, 90-Count
1x Now Foods L-tryptophan 1000mg, Tablets, 60-Count (or two of these)
1x
...Read more ›
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18 of 20 people found the following review helpful By Nicole on March 17, 2014
Size Name: 120 Verified Purchase
Let me first start off by saying I'm not prone to write reviews for products. But I vowed that I would write a review if this product helped me. And it has! I've been miserable for a very long time. I've had depression and anxiety for years. I thought I should deal with it and try to cope but it was taking its toll on my body. I was exhausted ALL the time. Sleeping became useless because I would toss and turn all night and I would wake up just as exhausted as before. Crying became a daily routine and I couldn't see why life was worth living. Until I tried this product. I'm on my third day of using this product and I'm feeling so much better. I'm sleeping through the night and my anxiety attacks have subsided. If you're experiencing similar problems try this product. My only regret is not finding this sooner.
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Want to discover more products? Check out these pages to see more: pure health restful sleep, pure herbs e.

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NOW Foods L-Tryptophan 500mg, 120 Vcaps
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Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.