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Source Naturals, L-Tryptophan, 500 mg, 60 Capsules

AU$16.16 AU$16.16 (Saved AU$12.81)

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Source Naturals, L-Tryptophan, 500 mg, 60 Capsules

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Source Naturals, L-Tryptophan, 500 mg, 60 Capsules

In Stock
  • Expiration Date: 03/2021
  • Shipping Weight:
    0.08 kg
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  • Product Code: SNS-01984
  • UPC Code: 021078019848
  • Package Quantity: 60 Capsules
  • Dimensions:
    6.1 x 6.1 x 10.2 cm , 0.07 kg
    Switch to Imperial units
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Product Overview


  • Dietary Supplement
  • Mood, Relaxation, Sleep
  • Non GMO Validated

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.

Other Ingredients

Gelatin (capsule), silica, magnesium stearate, dibasic calcium phosphate, and microcrystalline cellulose.

Hypoallergenic: contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.


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.

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.

Supplement Facts
Serving Size: 3 Capsules
Servings Per Container: 20
  Amount Per Serving: % DV
Iron (naturally occurring) 575 mcg 3%
L-Tryptophan 1.5 g †
†Daily Value not established.
iHerb Customer Reviews

Can't live with out them

Posted by iHerb Customer on Oct 10, 2017 | Verified Purchase

These have to the best thing in my life They are so much better than the chemist medication and they don't do any damage to my tummy. I started with 4 tablets a day after a month I'm down to 1 tablet in the morning and if extremely tired 2 before bed for a awesome sleep. πŸ‘πŸΌπŸ‘πŸΌπŸ‘πŸΌπŸ‘πŸΌ

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Evertyhing ok

Posted by iHerb Customer on Oct 08, 2017 | Verified Purchase

Very good product. Has helped me sleep combining it magnesium. It's like nothing I've tried before.

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Posted by iHerb Customer on Sep 11, 2017 | Verified Purchase

Best supplement for sleep!!!!

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Better than a sleeping tablet

Posted by iHerb Customer on Jul 09, 2017 | Verified Purchase

After suffering from chronic insomnia for 4 months my research led me to this product and it did not disappoint. I practically fell asleep standing up the first time I took it!! I was taking 2 capsules in the afternoon then 3 before bed to build up the serotonin however I have since cut back to 2-3 just before bed. I have to say that it is better than any sleeping tablet. If you have trouble getting to sleep and staying asleep do yourself a favour and purchase this product you will be amazed.

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RSD nerve pain

Posted by iHerb Customer on May 11, 2017 | Verified Purchase

L-tryptophan is a daily addition to balance CNS and calm nerve pain. It seems to be helpful in calming the burning sensations and generally relaxing the body. My daughter has used this or 5htp for years.

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