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Doctor's Best



Item: DB085

  • Science-based nutrition

  • Promotes mood and relaxation

  • Veggie capsules

500 mg 90 Veg Caps

Retail $33.99
Save 47%
In Stock

Supplement Facts

Serving Size 1 capsule

Servings per container 90 servings

  Amount per serving % Daily Value
Ajinomoto L-Tryptophan 500 mg

†Daily Value not established.

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

Suggested Adult Use: 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.

  • Non-GMO
  • Gluten Free
  • USP Pharmaceutical Grade
  • Vegan™
  • Veggie Caps

AjiPure® and TryptoPure® are registered trademarks of Ajinomoto Co. Inc.

Shipping Weight

.20 lbs

  • Science-based nutrition

  • Promotes mood and relaxation

  • Veggie capsules

L-Tryptophan by Doctor's Best features Ajinomoto TryptoPure® tryptophan. This essential amino acid is able to cross the blood-brain barrier. L-tryptophan is altered by enzymes to first form the intermediate amino acid 5-HTP and then serotonin. It is also the metabolic precursor to melatonin and to the B vitamin niacin. Supplementing the diet with Doctor's Best L-Tryptophan can improve sleep and enhance mood, and may also be beneficial in reducing carbohydrate cravings.

Terms and Ingredient Definitions

Doctor's Best L-Tryptophan Reviews

Summary of Customer Ratings & Reviews

Customer Ratings & Reviews

L-Tryptophan is rated 5.0 out of 5 by 4.
Rated 5 out of 5 by from This helps me This product helps me. When I stop taking it I feel it.
Date published: 2016-02-29
Rated 5 out of 5 by from LOVE L-Tryptophan! Can't rave enough about this product. Not only did it help my mood on a day to day basis, it helps me sleep soundly at night. I've never slept as soundly as I do now. I take 2 tablets before bed and highly recommend it to anybody that wakes up often or doesn't feel rested in the morning. It works and has given me a more positive daily outlook.
Date published: 2016-01-21
Rated 5 out of 5 by from Best L-tryptophan Excellent product. I was looking for L-Tryptophan without dairy, this one fit the bill. It works great for getting to sleep. Wish they made it in a pill form, as the capsule has a tendency to float up to the top of the stomach, pop open, and get into my esophagus, but I try to stay sitting up for a while, or take 30 min before bed time.
Date published: 2015-05-26
Rated 5 out of 5 by from Sleep like a baby! I find this a great value for Tryptophan! I just can't sleep without it. Before I tried this I would wake every night after sleeping a few hours, and lay there for hours before I could go back to sleep. I take two nightly after dinner, at least an hour before bed. Under stressful situations when I might have even more trouble sleeping I will take another right before bed. I sleep like a baby! Thank goodness we can get Tryptophan again!
Date published: 2012-03-16
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"With my personal 100% money-back satisfaction guarantee, you have nothing to lose and great savings to gain."

Lee Swanson, Founder of Swanson Health Products

Risk-Free Purchase Guarantee on Doctor's Best L-Tryptophan

If you are dissatisfied for any reason, we'll give you a full refund and pay return shipping.

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© 2017 Ratings based on results of the 2017 Survey of Supplement Users. More information at
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