A new study published in JAMA has revealed that over-the-counter sleep aids containing melatonin can have wildly variable amounts of the hormone, with some products containing up to 347 percent of the amount advertised on the label. This raises concerns over the safety, quality, and effectiveness of dietary supplements, which are not subject to FDA approval like over-the-counter medicines. Not only do melatonin gummies have potential side effects, but they are also commonly given to children. The study highlights the need for more scrutiny of the supplement industry and raises questions about the ideal dose, timing, and long-term effects of melatonin use. Pediatricians advise parents to consult with them before using melatonin, especially for children.