I've read that Swanson uses Ajinomoto I found this while trying to purchase some since direct from Ajinomoto is $1/gram at least at the 500g tub which is the smallest they sell, this is a great deal at less than half that cost, also the graphics on these bottles looks old I personally would purchase the new ones directly from them or research and find out if this older label is the Ajinomoto (very high quality). A word of warning however when taking pharmaceutical grade l-tryptophan: 500mg dosage is extremely high in my experience, I recommend starting with 1/4 of that (if tablets use a pill cutter/razor blade to divide, if it's capsules open them and divide the powder), if you feel you need more then increase to 250mg but I highly doubt you'd need to. 500mg was quite unpleasant and I actually had a difficult time sleeping, I hope this helps you.

Helped me with anxiety and depression, and insomnia. I took for about 3 months, and take them as needed now to sleep. I'd take this along with a Gaba, waiting an hour before and after eating for the effect, and I found they helped me. I suggest one do their research (the diet cure and the mood cure website/book, etc.) first to find out which amino acid could help you, and if you can afford to see a naturopath or someone, that would be great. However, I had low funds, and so my aunt, who researches nonstop, suggested them for me. I tried them and they helped me, while I changed my diet, exercised and continued seeing a classically trained homeopathic doctor, as I'd wanted medications to be my last resort.

This made a huge difference in being able to continue sleeping after discontinuing a low-dose antidepressant used for being able to go back to sleep after waking up after 2 or 3 hours. Unfortunately the drug was discontinued too quickly, so I am having to backtrack and taper off slowly, but I have hope that the tryptophan will make the difference.

I use this to help me sleep at night and does work

Just a good nights sleep with my melotonin and L-Triptophan.

The quality of my sleep is much improved when I take these. The directions say take one, but every now and then, if I feel I may have a really difficult time going to sleep, I'll take two. I find that I sleep deeper and better when I take this.