The FDA doesn’t monitor supplements such as melatonin since it’s not a ‘drug’ so don’t blame them. A shocking new study shows that brands have been mislabeling sleeping aid supplements sold in stores and online. Out of the 25 brands tested, 22 had different amounts of melatonin in gummies than was written on the label. (Melatonin is the hormone that helps regulate sleep.)
One had as little as 74% of the total amount listed, while another had as much as 347% more than the amount advertised,” researchers discovered.
Another brand had no melatonin but rather CBD.
‘A jar of gummies might also contain ingredients you didn’t count on,’ said one of the doctors involved in the study. “One of the products that listed melatonin contained no melatonin at all. It was just cannabidiol or CBD.”
This is especially worrying since some parents have been giving them to their children at bedtime.

Side effects of melatonin use in children can include drowsiness, headaches, agitation, and increased bed-wetting or urination in the evening. According to the National Center for Complementary and Integrative Health, there is also the potential for harmful interactions with medications and allergic reactions to the melatonin.

The agency also warns supplements could affect hormonal development, “including puberty, menstrual cycles, and overproduction of the hormone prolactin,” which causes breast and milk development in women.