After all, melatonin is natural, right? You also need to make sure he is getting a good multivitamin with a b complex (the bs are important in converting the tryptophan). Foods That Help Toddlers Sleep And Stay Asleep Toddler Sleep Help Toddler Sleep Kids Sleep Melatonin did not work for my daughter, but tryptophan does. Melatonin not working for toddler . It should start working again. It is an amino acid, so it needs to be given on an empty stomach, particularly free from other protiens. There are other ways to improve sleep if melatonin is not working. And not getting enough quality sleep is an. Nearly 50% of older adults suffer from insomnia, trouble getting to sleep, waking up early, or feeling groggy upon waking. You’ve been taking melatonin too often. A light snack before bed is ok, but drinking and eating should be avoided if possible for at least 2 hours before bed. In general, melatonin should not be given to healthy, typically developing children under ...