Bests & Worsts Reviews from Amazon

This along with L-Tyrosine have been a life saver for me. I take two of these before bed (along with Magnesium) and I sleep like a baby, whereas I used to toss and turn every night until 4-5am. It has also helped tremendously with my mood (again, along with the L-Tyrosine which I take 2 of as soon as I wake up). L-Tryptophan is a precursor for Serotonin and L-Tyrosine is a precursor for Dopamine - so please consult with your doctor before taking either one of these supplements. If you're on anti-depressants, for example, you run the risk of something called serotonin syndrome if you also take L-Tryptophan with it - so definitely please consult with your doctor.