Hero image 0 of Source Naturals L-Tryptophan 500 mg 60 Capsules, 0 of 7
Source Naturals L-Tryptophan 500 mg 60 Capsules
Key item features
- Melatonin and serotonin are hormones crucial for mood regulation and stress response.*
- Supports the body's natural relaxation processes.
- Contributes to an overall sense of feeling better.
- 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.*
- Manufactured in the USA. Production takes place in Scotts Valley, CA.
- Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration (FDA).
Specs
- BrandSource Naturals
- Size500 mg
- Enteral medication formCapsules
- Primary ingredientl-Tryptophan
- FlavorUnflavored
- Allergen-free statementsDairy-Free, Egg-Free, Gluten-Free, Soy-Free, Wheat-Free
Current price is USD$10.9518.3 ¢/count
Price when purchased online
- Free shipping
Free 30-day returns
How do you want your item?
Columbus, 43215
Arrives between May 8 - May 11
|
Sold and shipped by Health Chest
4.727848101265823 stars out of 5, based on 316 seller reviews(4.7)316 seller reviews
Free 30-day returns - in store or online
More seller options (1)
Starting from $17.48
About this item
Product details
Source Naturals L-Tryptophan 500 mg capsules are designed to help support relaxation, promote restful sleep, and contribute to an overall feeling of well-being. This essential amino acid plays a crucial role in the body's synthesis of both melatonin and serotonin, which are important hormones involved in regulating mood and stress response. Each capsule provides 500 mg of L-Tryptophan, and the product is rigorously tested for purity and quality. It is also free from common allergens such as yeast, dairy, egg, gluten, corn, soy, and wheat, and contains no sugar, starch, salt, preservatives, artificial colors, flavors, or fragrances, making it a clean and reliable choice for your wellness routine.
- Melatonin and serotonin are hormones crucial for mood regulation and stress response.*
- Supports the body's natural relaxation processes.
- Contributes to an overall sense of feeling better.
- 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.*
- Manufactured in the USA. Production takes place in Scotts Valley, CA.
- Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration (FDA).
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it. Â
Specifications
Dietary Method
Supplement
Multipack Quantity
1
Count Per Pack
50
Brand
Source Naturals
Indications
Stop Use Indications
If you are pregnant, may become pregnant, breastfeeding, or are taking medications such as SSRIs or MAOIs, consult your health care professional before using this product.
Health Concern
Sleep Support Mood Support
Directions
Dosage
1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take an additional 3 capsules before bed.
Instructions
1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take 3 capsules before bed.
Warranty
Warranty information
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Ingredients
Ingredients
l-Tryptophan
Warnings
Warning Text
Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children. STORE IN A COOL, DRY PLACE. CAUTION: If you are pregnant, may become pregnant,breastfeeding, or are taking medications such as SSRIs or MAOIs, consult your health care professional before using this product. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.
Similar items you might like
Based on what customers bought
Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Capsules $17.46
$1746current price $17.46Source Naturals L-Tryptophan, for Mood, Relaxation, and Sleep*, 500mg - 120 Capsules
284.8 out of 5 Stars. 28 reviewsBest Naturals Melatonin 3 mg 240 Tablets $8.99
2 optionsAvailable in additional 2 options$899current price $8.99Best Naturals Melatonin 3 mg 240 Tablets
494.7 out of 5 Stars. 49 reviewsSource Naturals, L-Tryptophan with Coenzyme B-6 for Positive Mood Enhancement and Sleep 500mg 30 Tablets $8.87
$887current price $8.87Source Naturals, L-Tryptophan with Coenzyme B-6 for Positive Mood Enhancement and Sleep 500mg 30 Tablets
100+ bought since yesterday Melatonin 20 mg - 240 Fast Dissolve Tablets - Drug Free - Natural Berry Flavor - Vegetarian, Non-GMO, Gluten Free 240 Count $8.99 Was $9.99
100+ bought since yesterday
3 optionsAvailable in additional 3 options$899current price $8.99, Was $9.99$9.99Melatonin 20 mg - 240 Fast Dissolve Tablets - Drug Free - Natural Berry Flavor - Vegetarian, Non-GMO, Gluten Free 240 Count
2024.7 out of 5 Stars. 202 reviewsSource Naturals Sleep Science Melatonin, Orange Flavored Liquid Sleep Aid, 1 mg, 2 Fluid oz $9.64 $4.82/fl oz
$964current price $9.64$4.82/fl ozSource Naturals Sleep Science Melatonin, Orange Flavored Liquid Sleep Aid, 1 mg, 2 Fluid oz
44.3 out of 5 Stars. 4 reviewsSource Naturals Pregnenolone 25 mg 120 Tablets $14.26
$1426current price $14.26Source Naturals Pregnenolone 25 mg 120 Tablets
33.7 out of 5 Stars. 3 reviewsVitamatic Melatonin 12 mg – Natural Berry Flavor – 300 Fast Dissolve Tablets – Formulated by Healthcare Professionals – Non-GMO, Gluten Free $9.99
$999current price $9.99Vitamatic Melatonin 12 mg – Natural Berry Flavor – 300 Fast Dissolve Tablets – Formulated by Healthcare Professionals – Non-GMO, Gluten Free
264.6 out of 5 Stars. 26 reviews100+ bought since yesterday Nature's Bounty Sleep3 Melatonin, Maximum Strength Drug Free Sleep Aid, Tri-Layered Tablets, 10 Mg, 30 Ct $9.97 33.2 ¢/count
100+ bought since yesterday
2 optionsAvailable in additional 2 options$997current price $9.9733.2 ¢/countNature's Bounty Sleep3 Melatonin, Maximum Strength Drug Free Sleep Aid, Tri-Layered Tablets, 10 Mg, 30 Ct
10344.6 out of 5 Stars. 1034 reviewsSource Naturals - Black Cumin Seed Oil - for Respiratory Support* - 60 Softgels $6.39
$639current price $6.39Source Naturals - Black Cumin Seed Oil - for Respiratory Support* - 60 Softgels
54 out of 5 Stars. 5 reviewsMelatonin Sleep Spray 8 fl oz | with Melatonin & Lavender | for Men and Women | by Piping Rock $9.99
$999current price $9.99Melatonin Sleep Spray 8 fl oz | with Melatonin & Lavender | for Men and Women | by Piping Rock
25 out of 5 Stars. 2 reviewsSource Naturals Magnesium Malate 100 Caps $9.62
$962current price $9.62Source Naturals Magnesium Malate 100 Caps
784.7 out of 5 Stars. 78 reviewsSource Naturals L Glutathione - 60 Tablets $6.90
$690current price $6.90Source Naturals L Glutathione - 60 Tablets
25 out of 5 Stars. 2 reviewsSource Naturals Black Cumin Seed Oil for Respiratory Support 120 Softgels $13.77
$1377current price $13.77Source Naturals Black Cumin Seed Oil for Respiratory Support 120 Softgels
11524.7 out of 5 Stars. 1152 reviewsNutricost Sleep Aid Complex 1330mg Serving (90 Capsules) Supplement $11.95
$1195current price $11.95Nutricost Sleep Aid Complex 1330mg Serving (90 Capsules) Supplement
45 out of 5 Stars. 4 reviewsAmazing Formulas Melatonin 3 Mg 240 Tablets $8.99 3.7 ¢/count
2 optionsAvailable in additional 2 options$899current price $8.993.7 ¢/countAmazing Formulas Melatonin 3 Mg 240 Tablets
494.8 out of 5 Stars. 49 reviews500+ bought since yesterday Zarbee’s Children's Sleep Gummies with Melatonin, Natural Berry, 34 Count $9.98 29.4 ¢/count
500+ bought since yesterday
$998current price $9.9829.4 ¢/countZarbee’s Children's Sleep Gummies with Melatonin, Natural Berry, 34 Count
23444.7 out of 5 Stars. 2344 reviewsSource Naturals Nutraspray Melatonin - Orange 1.5 mg 2 fl oz Spray $9.99 $5.00/fl oz
$999current price $9.99$5.00/fl ozSource Naturals Nutraspray Melatonin - Orange 1.5 mg 2 fl oz Spray
224.8 out of 5 Stars. 22 reviewsSource Naturals Guarana Energizer 900 mg 60 Tablets $11.14
$1114current price $11.14Source Naturals Guarana Energizer 900 mg 60 Tablets
4974.6 out of 5 Stars. 497 reviewsNOW Supplements, L-Tryptophan 500 mg, Encourages Positive Mood*, 120 Veg Capsules $22.22 Was $31.51 18.5 ¢/count
$2222current price $22.22, Was $31.51$31.5118.5 ¢/countNOW Supplements, L-Tryptophan 500 mg, Encourages Positive Mood*, 120 Veg Capsules
514.8 out of 5 Stars. 51 reviewsVitabod Melatonin 60mg with B6 - 120 Fast Dissolve Tablets - Drug Free - Natural Citrus Flavor - Vegetarian, Non-GMO, Gluten Free $9.99
3 optionsAvailable in additional 3 options$999current price $9.99Vitabod Melatonin 60mg with B6 - 120 Fast Dissolve Tablets - Drug Free - Natural Citrus Flavor - Vegetarian, Non-GMO, Gluten Free
684.6 out of 5 Stars. 68 reviews
Check out these related products
Amazing Formulas L-Tryptophan 1000mg Per Serving 60 Tablets Supplement | Non-GMO | Gluten Free $17.09
$1709current price $17.09Amazing Formulas L-Tryptophan 1000mg Per Serving 60 Tablets Supplement | Non-GMO | Gluten Free
234.4 out of 5 Stars. 23 reviewsAmazing Formulas Acetyl L-Carnitine 1500 Mg Per Serving 120 Veggie Capsules Supplement | Non-GMO | Gluten Free | Suitable for Vegetarians $9.98 $2.50/oz
4 optionsAvailable in additional 4 options$998current price $9.98$2.50/ozAmazing Formulas Acetyl L-Carnitine 1500 Mg Per Serving 120 Veggie Capsules Supplement | Non-GMO | Gluten Free | Suitable for Vegetarians
474.6 out of 5 Stars. 47 reviewsAmazing Formulas L-Tryptophan 500 Mg Per Serving 120 Capsules Supplement | Non-GMO | Gluten Free | Made in USA $12.99
$1299current price $12.99Amazing Formulas L-Tryptophan 500 Mg Per Serving 120 Capsules Supplement | Non-GMO | Gluten Free | Made in USA
15 out of 5 Stars. 1 reviewsSeeking Health Acetyl-L-Carnitine - Acetyl-L-Carnitine Supplement - Supports Energy, Healthy Fat Metabolism, & Memory Health - 500 mg, 90 Capsules $27.00
$2700current price $27.00Seeking Health Acetyl-L-Carnitine - Acetyl-L-Carnitine Supplement - Supports Energy, Healthy Fat Metabolism, & Memory Health - 500 mg, 90 Capsules
1424.9 out of 5 Stars. 142 reviewsKirkman Labs TMG Liquid, Natural Raspberry, 16 fl oz (473 ml) $44.10
$4410current price $44.10Kirkman Labs TMG Liquid, Natural Raspberry, 16 fl oz (473 ml)
64.8 out of 5 Stars. 6 reviewsCarlson L Arginine Powder 100 Grams $14.49
$1449current price $14.49Carlson L Arginine Powder 100 Grams
254.5 out of 5 Stars. 25 reviewsSource Naturals Wellness ImmuNitric Nitric Oxide Builder for Immune System Support* 45 Tablets $6.61
$661current price $6.61Source Naturals Wellness ImmuNitric Nitric Oxide Builder for Immune System Support* 45 Tablets
Pure Encapsulations 7-KETO DHEA 25 mg | Unique DHEA Metabolite Supplement to Support Thermogenesis* | 120 Capsules $31.50
$3150current price $31.50Pure Encapsulations 7-KETO DHEA 25 mg | Unique DHEA Metabolite Supplement to Support Thermogenesis* | 120 Capsules
Solaray L-Glutathione 50 mg - 60 Capsules $18.68
$1868current price $18.68Solaray L-Glutathione 50 mg - 60 Capsules
304.9 out of 5 Stars. 30 reviewsAmazing Formulas L-Lysine 1000 Mg Per Serving 360 Tablets Supplement | For Both Men & Women | Non-GMO | Gluten-Free | Made in USA $8.99 Was $9.99
$899current price $8.99, Was $9.99$9.99Amazing Formulas L-Lysine 1000 Mg Per Serving 360 Tablets Supplement | For Both Men & Women | Non-GMO | Gluten-Free | Made in USA
144.9 out of 5 Stars. 14 reviewsSource Naturals Magnesium Citrate 133 Mg Capsules - 90 Ea $11.69
$1169current price $11.69Source Naturals Magnesium Citrate 133 Mg Capsules - 90 Ea
54.8 out of 5 Stars. 5 reviewsSource Naturals Magnesium Citrate, Supports Bone and Heart Health* 133 mg - 180 Capsules $14.00 7.8 ¢/count
$1400current price $14.007.8 ¢/countSource Naturals Magnesium Citrate, Supports Bone and Heart Health* 133 mg - 180 Capsules
64.8 out of 5 Stars. 6 reviewsNOW Foods L-Tryptophan, 500 mg, 60 Veg Capsules $14.39 24.0 ¢/count
$1439current price $14.3924.0 ¢/countNOW Foods L-Tryptophan, 500 mg, 60 Veg Capsules
294.9 out of 5 Stars. 29 reviewsPure Encapsulations L-Carnosine | Amino Acid Supplement for Joints, Brain, Antioxidants, Heart Health, and Exercise* | 60 Capsules $87.50
$8750current price $87.50Pure Encapsulations L-Carnosine | Amino Acid Supplement for Joints, Brain, Antioxidants, Heart Health, and Exercise* | 60 Capsules
null4.3 out of 5 Stars. null reviewsLife Extension SAMe, 200 mg - Promotes mood, liver and joint health - Gluten-Free, Non-GMO - 30 Enteric-Coated Vegetarian Tablets $18.23
$1823current price $18.23Life Extension SAMe, 200 mg - Promotes mood, liver and joint health - Gluten-Free, Non-GMO - 30 Enteric-Coated Vegetarian Tablets
594.6 out of 5 Stars. 59 reviewsSource Naturals Vitamin D-3 10000 Iu 240 Softgel $19.99
$1999current price $19.99Source Naturals Vitamin D-3 10000 Iu 240 Softgel
Amazing Formulas DMAE Bitartrate 100G 286 Servings $8.98 $1.12/count
$898current price $8.98$1.12/countAmazing Formulas DMAE Bitartrate 100G 286 Servings
24.5 out of 5 Stars. 2 reviewsLife Extension Arginine Ornithine Powder, promotes muscle health & recovery, gluten free, non-GMO, net weight 150 grams $15.30
$1530current price $15.30Life Extension Arginine Ornithine Powder, promotes muscle health & recovery, gluten free, non-GMO, net weight 150 grams
484.3 out of 5 Stars. 48 reviews
Customer ratings & reviews
How item rating is calculated
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |
Showing 1-3 of 20 reviews
Dec 10, 2025
Katty
5 out of 5 stars review
Verified Purchase
I buy it to help with sleep. Source Naturals seems to be a good brand. Their supplements work the way they're supposed to
Helpful?3O7K7TKM7K4X39453303
Aug 21, 2014
smchermak
5 out of 5 stars review
L-Tryptophan
I take one supplement in the morning and one at night. It helps me sleep well at night and helps my mood during the day. It worked well for me the first night I took it. Sometimes it can leave a bad aftertaste, but I found if I drink enough water this doesn't happen.
Review from gnc.com
Helpful?3O7K7TKM7K4X39453303
Aug 21, 2014
smchermak
5 out of 5 stars review
L-Tryptophan
I take one capsule in the morning and one at night. It helps me sleep well and keeps my mood balanced throughout the day. It worked for me the first night I used it. Sometimes it can leave an aftertaste, but I have found if I drink more water that usually doesn't happen.
Review from gnc.com
Helpful?3O7K7TKM7K4X39453303
