This dosage of 1000mg of tryptophan with cofactor vitamin b6 works extremely well. It helps lift my depression and helps with fatigue. I fall asleep easily and feel rested when I wake up. Other cofactors that are necessary are magnesium and vitamin b5 to convert tryptophan to serotonin and melatonin. These could be taken separately. I found the 500mg to be insufficient.

iHerb Customer

Posted on Mar 25, 2021

So Great

Verified Purchase

Rewarded Review

Tryptophan was recommended to me by my Naturopath. It has been a difference-maker. I take 3000mg whenever i can't sleep, spend about 20 minutes reading a book and then I'm out like a light for deep sleep. I love these things. I always keep 3 bottles in my cabinett

iHerbCustomer

Posted on Jun 9, 2022

Verified Purchase

good for relaxing and prior to sleepging

iHerb Customer

Posted on Jul 2, 2016

I need this!

Verified Purchase

I can't sleep without it. Have put my friends on to it too . This is a good brand for this product I have bought a few.

iHerb Customer

Posted on Jun 1, 2020

Great service and delivery, love the product

Verified Purchase

I take one of these each night for sleep and mood, and really notice the difference when I don't. And if it's a particularly stressful time, I take 2 a night. I haven't experienced any negative side effects.

iHerb Customer

Posted on Oct 3, 2016

They work but

Verified Purchase

If you dont mind head spins 30mins later if youre still up and about. Otherwise take them just before bed. Havent tried them during the day. Just take them for quality sleep.

iHerb Customer

Posted on Dec 27, 2018