L-Tryptophan 1000 Mg

2 Reviews

Veg Capsules 60

Brain Serotonin Precursor, Supporta a Sense of Calmness and Restful Sleep

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SKU: l-tryptophan-1000-mg-DGL
60Veg Capsules
$52.20
In Stock
Ships today if you order in the next 15 hours 48 minutes.

Product Details

Brand: Douglas Laboratories

Category: Amino Acids

Product Code: l-tryptophan-1000-mg-DGL

Servings per Container: 30

Quantity per Container: 60 Veg Capsules


L-Tryptophan from Douglas Labs is a natural sleep aid that contains l-tryptophan for sleep support and may help with food cravings.

It supplies 1000 mg of pure L-Tryptophan plus other synergistic cofactors in two vegetarian capsules. Tryptophan may be a useful dietary supplement for individuals wishing to support neurological function and healthy emotional wellbeing.

  • May support healthy mood and restful sleep
  • May support womens emotional well being before menstruation
  • May be helpful in supporting healthy relaxation and occasional food cravings

Serotonin, an important brain neurotransmitter, is key in the regulation of appetite, mood, and melatonin production. The presence of serotonin in the brain is associated with a balanced emotional state. This is achieved in part by decreasing the activity of certain excitatory hormones, including dopamine and noradrenaline. Serotonin also acts as a satiety signal in the brain, thereby naturally regulating food intake.

Additionally, as a precursor of melatonin, serotonin is involved in regulating sleep patterns. Serotonin is unable to cross the blood-brain barrier and is therefore synthesized in the brain. Tryptophan, an essential amino acid, is a precursor for the synthesis of serotonin. Tryptophan crosses the blood-brain barrier and is converted to L-5-Hydroxytryptophan (5-HTP), which in turn is converted into serotonin. Vitamins B2 and B6, niacinamide and Vitamin C are necessary cofactors to ensure the proper synthesis of serotonin.

Ratings & Reviews

2 reviews

  • 4 stars
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  • 3 stars
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  • 1 star
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11/10/2011 11:00:00 pm

Great product!

by Brandon -

Works great. I have a lot of allergies and food sensitivities and I do just fine with this supplement. Highly recommended.

Not medical or professional advice

1/21/2016 12:00:00 am

Not 1000 mg

by pqsmith

I expected each of these capsules to be 1000 mg of L-tryptophan. However, you have to take 2 capsules to get 1000 mg, so they are actually 500 mg each. You end up paying more than expected for each serving and I thought this was a deceptive practice. Why not just list them as 500 mg capsules? I wrote Douglas Labs about this, but their response showed that they did not think this was a problem. I am now taking a brand of L-tryptophan that I really like, and it is actually 1000 mg per caplet.

Not medical or professional advice