skip to main content

Doctor's Best   L-Tryptophan with TryptoPure® - 90 Veggie Capsules

Shop all Doctor's Best products
11 Reviews

"Seemed to help with my daughter's ADD... along with removing gluten."  Read all reviews

Item Number: DRB1040
Serving Size: 1 Capsule Servings per Container: 90
Price per Serving:  $0.23 Price per Unit*: $0.23 per Capsule
* Price Per Unit may reflect product's price per capsule, tablet, ounce, fluid ounce, etc.
Out of Stock
Regular Price:  $35.99 $20.58
Free Shipping

Doctor’s Best L-Tryptophan with TryptoPure® promotes normal‚ restful sleep and healthy mood and behavior. L-tryptophan‚ an essential amino acid‚ is not synthesized by the body and must be obtained through dietary sources. Doctor’s Best L-Tryptophan contains TryptoPure®‚ a highly purified‚ pharmaceutical-grade L-tryptophan that meets the purity of both the Japanese Pharmacopeia (JP) and the United States Pharmacopeia (USP).



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 # DRB-00126
  • UPC # 753950001268
Official Website: http://www.drbvitamins.com

Serving Size: 1 Veggie Capsule
Servings Per Container: 90

Amount Per Serving / % DV

L-Tryptophan (From TryptoPure®) 500mg / †

†Daily Value not established.

Other Ingredients: Modified cellulose (vegetarian capsule)‚ magnesium stearate (vegetable source)‚ microcrystalline cellulose‚ silicon dioxide.

Non-GMO / Gluten-Free / Soy-Free / Vegan / Vegetarian.


Take 1 capsule daily‚ or as recommended by a nutritionally informed physician. For optimum absorption‚ take separately from protein-containing foods and dietary supplements containing protein or amino acids.


Store in a cool‚ dry place.


  • Dairy Free
  • Gluten Free
  • GMO Free
  • Soy Free
  • Vegan
  • Vegetarian

Ratings and Reviews

Write a Review
  • 4.5
  •  
  •  
  •  
  •  
  •  
5 11
  • 11 Reviews
    • Verified Buyer

      Seems good

      from ASHFORD CT on 5/20/2022
      Hard to tell, but it seems just as good as the Life Extension tryptophan supplement I'd been taking previously.

      Pros

      Reasonably priced, good dose per pill, trust this brand

      Cons

      Nothing that I know of yet
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      For my daughter's ADD

      from Watertown, Wisconsin on 10/25/2019
      Seemed to help with my daughter's ADD... along with removing gluten.

      Pros

      Easy to give to a child

      Cons

      Had a stronger taste than some aminos. She didn't love it, but could take it.
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      STRONG STUFF

      from FLA on 3/22/2019
      & by that I mean be wary of nausea if u take 2 500mg capsules @ a time like I do to boost serotonin for OCD. Doctor’s Best L-Tryptophan says ‘w/TryptoPure’ which I think makes it stronger. It’s a good, strong Tryptophan (good to put u to sleep, so to speak) but I had to eat w/it if I took 2 pills; I like to b able to take it & go right to sleep if my OCD is particularly bad. But then again, the dosage is & most people will take 1 500mg. capsule @ a time, & u will b fine. I just wanted to warn of stomach upset, but it works.

      Pros

      Works well, helps for sleep, great price for 90 count capsules

      Cons

      Be wary of strong nausea if u take more than 1 capsules @ a time
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Excellent Product!

      from Enfield, CT on 3/14/2016
      Best L-Tryptophan TrytoPure by Doctor 's Best helps me fall and stay asleep!

      Pros

      Affordable.

      Cons

      Nothing.
      review-checkI would recommend this item to a friend.
    • Home Run with L-T TryptoPure (500 mg)

      from Lago Vista, TX on 10/02/2014
      Bought some Best L-Tryptophan TryptoPure by Doctors Best several years ago. Put on shelf, didn't use. WOW! What a difference in just a week! Thanks.

      Pros

      It works! Price is right too!!

      Cons

      Nothing.
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Great for Sleep!

      from Grand Rapids, MI on 1/01/2014
      I buy this to help me sleep as I need all the help I can get living with chronic pain. I take it along with 5-HTP and melatonin and I am good to go!
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      This the best sleep aid ever!!

      from Willow Grove, PA on 10/01/2013
      I was placed on Best L-Tryptophan TryptoPure because my sleep was constantly interrupted. After a few weeks I am now sleeping straight through the night. I would not be without Best L-Tryptophan TryptoPure!!

      Pros

      Sleep!!!

      Cons

      nothing
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Good Product

      from Tualatin, Oregon on 8/28/2013
      I think Best L-Tryptophan TryptoPure helps with sleep. Dont notice any significant benefits at this time. Good price.

      Pros

      Good price

      Cons

      review-checkI would recommend this item to a friend.
    • Works well

      from Coral Gables, FL on 7/24/2013
      Great L tryptophan. Will buy Best L-Tryptophan TryptoPure for my mother who has depression.
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      did not work for me

      from Ewing, NJ on 1/09/2013
      I tried Best L-Tryptophan TryptoPure by Doctor's Best for a month. I thought it possibly improved my mood the next day after taking but I was taking it for sleep and I did not have one restful night after taking this. It would usually knock me out although give me this scary pulsing in my head when kicking in. I would always wake up a few hours later and usually not be able to fall asleep which I usually can when not taking tryptophan.
  • 1
    • Previous

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.

Ask a Question

Please log in to submit a question Log In