Also known as: 2-Amino-3-(1H-indol-3-yl)propanoic Acid
You've probably heard of tryptophan since it's found in small amounts in turkey and gets blamed for countless Thanksgiving naps. Like 5-HTP, tryptophan is a precursor to serotonin, which your body uses to make melatonin. Research points to L-tryptophan as a serotonergic influencer that can impact cognition, mood and sleep. Taking as little as 1 gram a day may improve quality of sleep and help you fall asleep faster.