Manufacturer | NOW |
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Place of Business | NOW Canada Health Group, 5068 Whitelaw Road, RR6 Guelph, ON N1H 6J3 |
Item model number | L-Tryptophan 220mg 60vcap |
Product Dimensions | 8 x 4 x 6 cm; 45 g |
ASIN | B01J28ASES |
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NOW Supplements, L-Tryptophan 220 mg, Encourages Positive Mood*, Supports Relaxation*, 60 Veg Capsules
Brand | NOW |
Flavour | Unflavored |
Primary supplement type | L-Tryptophan |
Unit count | 60 count |
Item form | Capsule |
Item weight | 45 Grams |
Item dimensions L x W x H | 8 x 4 x 6 Centimetres |
Product benefits | Metabolism |
Age range (description) | Adult |
Number of Items | 1 |
About this item
- AMINO ACID: An essential amino acid that is not synthesized by the body and must be obtained by diet or supplementation.
- CRITICAL INGREDIANTS: Critical for the production of serotonin and melatonin, which help to support a positive mood, healthy sleep patterns, and proper immune system function*
- QUALITY ASSURANCE: Every lot tested to be free of Peak E and microbial contamination
- GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
- FAMILY OWNED & OPERATED: Proudly made in Canada by a family owned and operated company.
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Important information
Safety Information
Consult a health care practitioner prior to use if you are pregnant or breastfeeding. Tryptophan supplementation should be avoided in depression with reversed diurnal variation. Patients with liver cirrhosis should avoid tryptophan supplementation.
Ingredients
Each capsule contains: L-Tryptophan 220 mg. Non-Medicinal Ingredients: Veg Capsule (hypromellose, water), Cellulose, Stearic Acid, Hydroxypropyl Methylcellulose.
Directions
Adult Dosage: Take 1 capsule daily with meals.
Legal Disclaimer
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.
Product description
L-Tryptophan is a large neutral amino acid essential to human metabolism because it is the metabolic precursor of serotonin (a neurotransmitter), melatonin (a neurohormone), and niacin (vitamin B3) which assist in the regulation of sleep, positive mood and immune function. L-Tryptophan is not synthesized by the body and must be obtained from the diet. Natural color variation may occur in this product. Our NOW natural and organic Supplements are an effective way to ensure you and your loved ones are getting essential vitamins, minerals and nutrients for daily optimal health. Since 2000, the NOW brand has been supporting Canadians with a mission to provide products that empower people to lead healthier lives. 70% of the NOW products in Canada are made or packaged in Guelph, Ontario, employing hundreds of Canadians from coast to coast. NOW performs 31,000 quality tests every month to ensure you get the highest quality supplements at the best price possible. Our promise - what is on the label, is precisely what is in the bottle.
From the brand

NOW's dedication to superior quality has propelled us from local health food store to industry leader of high-quality supplements.
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Products Inspired by Nature
Natural at NOW means products are sustainable, plant-derived, and finished as close to nature as possible without harmful substances.
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High-Quality Ingredients
Strict quality requirements and scientific processes ensure that every ingredient accepted into our facilities meet our specifications.
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Comprehensive Testing
NOW's in-house laboratories test from raw ingredients to finished products to ensure that what’s on the label is in the bottle.
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Superior Manufacturing
NOW meets/exceeds FDA CGMPs, underscoring our commitment to quality. NOW was one of the first to be CGMP certified by a third-party.
Product information
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Product details
- Is discontinued by manufacturer : No
- Product Dimensions : 8 x 4 x 6 cm; 45 g
- Date First Available : July 25 2016
- Manufacturer : NOW
- Place of Business : NOW Canada Health Group, 5068 Whitelaw Road, RR6 Guelph, ON N1H 6J3
- ASIN : B01J28ASES
- Item model number : L-Tryptophan 220mg 60vcap
- 鶹 Rank: #8,242 in Health & Personal Care (See Top 100 in Health & Personal Care)
- #15 in 5-Hydroxytryptophan
- Customer Reviews:
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Customer reviews
Customers say
Customers like the product for its ability to improve their mood and sleep quality. They mention it's soothing, good for promoting relaxation, and relieving stress and anxiety.
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Customers like the mood of the product. They mention it makes them feel joyful, soothing, and good for promoting relaxation and relieving stress and anxiety.
"...Found that it is good for promoting relaxation and relieving stress and anxiety. Good price for it, too. Would recommend it." Read more
"Great for mood" Read more
"I started sleeping better and it seems like my mood is even a little better, I've been drinking for the second week" Read more
"These caps make me feel joyful and help ease agitation. It has the same soothing effect as drinking milk." Read more
Customers are satisfied with the sleep quality of the product. They mention it helps them sleep and increases serotonin.
"Helps me get a good night’s sleep if I take 2." Read more
"I started sleeping better and it seems like my mood is even a little better, I've been drinking for the second week" Read more
"...Dreamless nights of tossing and turning. This has helped with sleep." Read more
"Helps me sleep and increases serotonin, what’s not to love!" Read more
Reviews with images

Aide à régulariser les envis de sucre et sel
Top reviews from Canada
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- Reviewed in Canada on April 30, 2025Verified PurchaseI like the NOW brand.
A reliable brand, with a great variety of products, at a convenient price point.
Most people are familiar with tryptophan being in turkey and feeling sleepy after eating it.
That is one of the functions of tryptophan - to be converted into melatonin.
And that's why you feel sleepy after eating turkey. :)
Tryptophan is also used by the body to make serotonin - the feel good neurotransmitter.
5-HTP does the same thing.
Why?
The body uses tryptophan to make 5-HTP, which then converts it into the 2 different hormones: melatonin and serotonin.
Everybody's body is different when it comes to supplements.
I find that I prefer tryptophan over 5-HTP. I notice the effects more so.
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Reviewed in Canada on June 9, 2025Verified PurchaseDepuis que je l’ai arrêté je vois une différence honnêtement il aide à avoir un très bon mood
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Reviewed in Canada on October 12, 2024Verified PurchaseJ'ai commencé à prendre ce produit pour régule mes envis de sucre et sel depuis maintenant 2 mois et je vous le conseil fortement . Il ma aidé aussi commen anti stressé et ma aide à avoir un meilleur sommeil.
4.0 out of 5 starsJ'ai commencé à prendre ce produit pour régule mes envis de sucre et sel depuis maintenant 2 mois et je vous le conseil fortement . Il ma aidé aussi commen anti stressé et ma aide à avoir un meilleur sommeil.Aide à régulariser les envis de sucre et sel
Reviewed in Canada on October 12, 2024
Images in this review
- Reviewed in Canada on May 24, 2025Verified PurchaseGood value
- Reviewed in Canada on May 3, 2025Verified PurchaseReally hard on stomach, avoid taking it empty stomach. Its protein amino acid, better to avoid. I skipped this and went for NOW 5-htp 100mg.
- Reviewed in Canada on May 22, 2025Verified PurchaseSuper
- Reviewed in Canada on April 15, 2025Verified PurchaseVery happy with this supplement, as L-Tryptophan is not sold on the shelves in Canada. Found that it is good for promoting relaxation and relieving stress and anxiety. Good price for it, too. Would recommend it.
- Reviewed in Canada on May 4, 2025Verified PurchaseGreat for mood
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 and follow labels, warnings, and directions before using or consuming a product. This product may not be right for you. 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. 鶹.ca assumes no liability for inaccuracies or misstatements about products.