Melatonin product with low and high doses. Melatonin is a popular product often used by people who have to work at night and people who need it on a daily basis. Melatonine is a substance that regulated the day and night ritme. It is sold in many dosages and we advice to begin low if you have to experience with using Melatonin. These products are also often used by people who fly and travel a lot. This natural occuring substance is made from serotonin and is mostly found in the brain. Keep in mind that we also have many nutritional supplements in stock like vitamins, minerals and herbal products.