L-Tryptophan 500 mg - 120 Tablets

by Source Naturals
  • 4.8
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"I have used this product for years. Great product to help you fall asleep. You..."  Read all reviews

Item Number: SN2006
Serving Size: 3 Tablets Servings per Container: 40
Price per Serving:  $0.53 Price per Unit*: $0.18 per Tablet
* Price Per Unit may reflect product's price per capsule, tablet, ounce, fluid ounce, etc.
Only 4 In Stock - ORDER NOW. This item will ship today if ordered within 11 hr 49 min
Regular Price:  $30.25 $ $21.18
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These L-Tryptophan 500 mg 120 Tablets from Source Naturals may support sleep‚ mood‚ and relaxation.

L-tryptophan is an amino acid‚ a protein building block that can be found in proteins. L-tryptophan is called an essential amino acid because the body can’t make it and it must be acquired from food.

Getting a good amount of sleep is essential for staying alert and healthy. These days‚ everyone has busy schedules and related stress‚ which affects sleep. The L-Tryptophan in this supplement from Source Naturals gets converted to 5-hyrdoxytryptophan (5-HTP) and then to serotonin and melatonin. Serotonin and melatonin are known for their impact on mood and stress response and sleep-wake cycles.

Another specialty of this supplement from Source Naturals is that it might also support the immune system‚ being the body’s precursor to the kynurenines‚ which regulate immunity.

L-Tryptophan 500 mg 120 Tablets from Source Naturals is suitable for vegetarians and contains no yeast‚ dairy‚ egg‚ gluten‚ corn‚ soy‚ wheat‚ sugar‚ starch‚ salt‚ preservatives‚ artificial color‚ flavor‚ or fragrance.



These statements have not been evaluated by the Food and Drug Administration (FDA). These products are not meant to diagnose‚ treat or cure any disease or medical condition. Please consult your doctor before starting any exercise or nutritional supplement program or before using these or any product during pregnancy or if you have a serious medical condition.

  • MFG # SN1980
  • UPC # 021078019800
Official Website: http://www.sourcenaturals.com

Serving Size: 3 Tablets
Servings Per Container: 40

Amount Per Serving / % DV

Calcium 52mg / 5%
Iron (Naturally Occurring) 570mcg / 3%
L-Tryptophan 1.5g / †

†Daily Value not established.

Other Ingredients: Dibasic calcium phopshate‚ stearic acid‚ modified cellulose gum‚ and silica.

Suitable for Vegetarians and Hypoallergenic: Contains no yeast‚ dairy‚ egg‚ gluten‚ corn‚ soy‚ wheat‚ sugar‚ starch‚ salt‚ preservatives‚ artificial color‚ flavor‚ fragrance.

Non-GMO.

1 tablet three times daily‚ between meals and preferably with fruit juice. To support restful sleep‚ take 3 tablets before bed.

If you are pregnant‚ may become pregnant‚ breastfeeding‚ may become pregnant‚ or are taking medications such as SSRIs or MAOIs consult your health care professional before using this product.

Do not use if either tamper resistant seal is broken or missing.

Keep out of the reach of children.

Store in a cool‚ dry place.

  • Corn Free
  • Dairy Free
  • Egg Free
  • Gluten Free
  • GMO Free
  • Hypoallergenic
  • Salt Free
  • Soy Free
  • Starch Free
  • Sugar Free
  • Vegetarian
  • Wheat Free
  • Yeast Free

Ratings and Reviews

Write a Review
  • 4.8
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5 15
  • 15 Reviews
    • Verified Buyer

      Works great!

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      from MILROY PA on 7/09/2020
      It took about a week to see the results. I was taking it at different times to see what worked for me. I now take this about 2 hours before heading to bed at night. I does help give me a restful sleep, most of the time. I find with more rest, I am not as anxious about other things, so my mood is much better during the day. All in all a great product.

      Pros

      Even though the capsule is a bigger in size that what I normally take, it is easy to swallow.

      Cons

      I don't get the same results every night.
      I would recommend this item to a friend.
    • Verified Buyer

      Great product, great price

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      from Honolulu HI on 10/25/2019
      Good quality product and best price! I like the l-tryptophan from this brand the best. Really helps me sleep and feel better.

      Pros

      Good quality product, great price, and it works!

      Cons

      Nothing
      I would recommend this item to a friend.
    • Verified Buyer

      Great product, best price

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      from Honolulu HI on 10/25/2019
      Good quality product and best price! Love this brand's tryptophan. Very effective. Works to help me sleep.

      Pros

      Good quality and great price.

      Cons

      Nothing
      I would recommend this item to a friend.
    • Verified Buyer

      Excellent for going to sleep.

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      from Indiana on 11/03/2017
      Love L-Tryptophan 500 mg by Source Naturals! Best thing I've found for getting some shut eye. Too bad more people don't know about it.

      Pros

      No side effects.

      Cons

      Nothing.
      I would recommend this item to a friend.
    • Verified Buyer

      Sleep

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      from Lmp. on 1/15/2017
      I use this L-Tryptophan 500 mg by Source Naturals because its natural & it doesn't bother my stomach. When it's a fulll moon, I can't sleep- so I take this with melatonin. It almost always works! It is less expensive at PureFormulas!!

      Pros

      It's natural & not habit forming.

      Cons

      Nothing
      I would recommend this item to a friend.
    • Verified Buyer

      Really great product!

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      from CA on 5/21/2016
      I use L-Tryptophan by Source Naturals almost daily. Helps with sleep as well as mood. I prefer this to 5HTP.

      Pros

      Helps with sleep and mood.

      Cons

      Nothing. It's great.
      I would recommend this item to a friend.
    • Works for me!

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      from CA on 2/15/2016
      This is a very high quality L-Tryptophan by Source Naturals that I would recommend to anyone who has trouble sleeping or would like to stop taking prescription/OTC sleep aids. No hangover feeling and works throughout the night. Although a liquid version may work faster, I usually will wake-up a few hours later.

      Pros

      It works and has consistently been high quality!

      Cons

      Nothing.
      I would recommend this item to a friend.
    • Excellent product!

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      from Iowa on 8/24/2015
      I'm sleeping way better now since taking L-Tryptophan by Source Naturals!
      I would recommend this item to a friend.
    • Helps with relaxation.

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      from Florida on 8/17/2015
      L-Tryptophan by Source Naturals helps me unwind from a day of work and relax to help me fall asleep naturally.

      Pros

      It comes in capsules.

      Cons

      Nothing.
      I would recommend this item to a friend.
      1 of 1 people found the following review helpful.
    • Verified Buyer

      Love it!

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      from N.C. on 5/29/2015
      I take 3 capsules of L-Tryptophan by Source Naturals to sleep. Asleep with 15 mins and sleep soundly through the night.
      I would recommend this item to a friend.
      1 of 1 people found the following review helpful.
  • 1
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Customer Questions and Answers

Please ask any questions you may have about this specific product in the field below.

Your question(s) and our corresponding answer(s) will not be confidential and will be posted publically on this specific product page.

Additionally, PureFormulas is unable to directly recommend products in relation to specific health conditions. Please contact your trusted healthcare practitioner for direct product recommendations.

If you have any general questions regarding orders or our policies and programs, please contact our Customer Happiness Team @ 1.800.383.6008

If you are pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use. Your healthcare professional is the best source for guidance before beginning an exercise or nutritional supplement program.

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.

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