Hi, Thanks for posting in HCM. Tryptophan is is an essential amino acid that helps the body make proteins and certain brain-signaling chemicals. Tryptophan increases serotonin and melatonin, both which are neuro-transmitters in brain’s pineal gland. It is known to interact with those brain chemicals important to sleep and the timing of your biological clock’s sleep-wake cycle. When either serotonin or melatonin levels are is disrupted, one may suffer from insomnia (sleeplessness) and depression symptoms. Hence, L-tryptophan is an all-natural dietary supplement commonly used to counter insomnia as well as depression. As a home remedy, you can drink warm milk as a remedy for insomnia, as tryptophan present in milk can make you drowsy and help to get good sleep. Hope the information provided would be helpful. All the best.