Nutricost L-Tryptophan Capsules

$19.99 Our Price
120 Capsules Size

Nutricost L-Tryptophan Capsules are our #1 Rated L-Tryptophan Supplement, as it is high quality and half the price of its competitors. Nutricost L-Tryptophan Capsules feature 500 mg of L-Tryptophan in each serving. Click Here for Lowest Price

Uniquely, Nutricost is one of the few companies that control the full chain of manufacturing, from sourcing to manufacturing in an FDA-registered facility to warehousing and fulfillment, ensuring strict quality standards are met. Nutricost also offers exceptional customer support for all of its products.

Priced under $14, Nutricost L-Tryptophan Capsules come with 180 capsules, which is just $0.08 each!. With Nutricost, you can be assured that this product does NOT contain ANY extra ingredients, fillers, or preservatives.

Nutricost L-Tryptophan comes with a 120-day, no-questions-asked, money-back guarantee – the best guarantee on the market!

  • Our #1 L-Tryptophan!
  • Amazon’s Choice
  • Only $0.08 per Serving!
  • Potent 500 mg Per Serving
  • Non-GMO, Gluten Free, 3rd Party Tested
  • Made in a GMP Compliant, FDA Registered Facility


Allegra C.

I'm a lifelong insomniac and use this tryptophan plus GABA every night. Together they work as well as any prescription drug I've tried. There are no side-effects, no fuzziness or "hangover" the next morning (as with prescription drugs), no danger of habituation (which leads to the need for ever-greater doses), no chance of addiction, and no potential long-term health problems. Why doctors don't recommend this combination before handing out sleeping pills is beyond me. I've tried several brands of tryptophan and they all seem to work just fine, but the Nutricost is the best deal I've found for dosage plus reasonable cost. Also, since tryptophan is safe, you can play around a bit with the dosage. I find a single 500 mg capsule usually works fine (plus 500 mg of GABA) but if I've had an especially stressful day I know I can increase that dosage without any fears.


I use this to help initiate sleep, by taking it in the early evening and then again before bed, and even if I think I need more if I wake up in the night for the bathroom. This is on advice of Julia Ross in her book, The Mood Cure and The Diet Cure. It helps to build up one's natural serotonin which converts into melatonin and thus helps with sleep. Tho it is not for stopping a cortisol spike in the middle of the night; for that you need other things (like even a middle of the night snack to calm down your system, as per Julia Ross.) I highly recommend her books. I find the tryptophan to be very helpful, and have ordered it several times already.

mountain stream

I have been using L-tryptophan for a long time. I was not familiar with the Nutricost brand and was a little concerned that it was not going to be as effective as what I was using that was more expensive. But it is just as effective as what I was using before and I am completely satisfied with it.

No Name

This supplement is so integral in helping me retain deep, continuous sleep. This is imperative to me, as I have a chronic illness that disrupts my sleep throughout the night. Thet L-Tryptophan gently & soundly alleviates this problem & I awake without a groggy, foggy brain. I actually have gained repairative sleep!!!


Attn severe insomniacs! This combined with GABA pills may help you sleep, as it helped me. Nothing else helped but this managed to have an effect. It doesn't knock me out but is so much better than pharmaceuticals.