Nothing much you can do. The MCC operates in secret, so you can't find out the reasons. There's no point objecting because they have no interest in facts or common sense.
Elaborate?
Its when someone (or company or government institution) don't weigh the facts and common sense in a decision, and do whatever they want, whenever they want, regardless of if it's good for the people or not
http://www.webmd.com/vitamins-suppl...gredientid=940&activeingredientname=melatoninChildren: Melatonin should not be used in most children. It is POSSIBLY UNSAFE. Because of its effects on other hormones, melatonin might interfere with development during adolescence.
High blood pressure: Melatonin can raise blood pressure in people who are taking certain medications to control blood pressure. Avoid using it.
Diabetes: Melatonin might increase blood sugar in people with diabetes. Monitor your blood sugar carefully, if you have diabetes and take melatonin.
Depression: Melatonin can make symptoms of depression worse.
Seizure disorders: Using melatonin might increase the risk of having a seizure.
http://archive.ahrq.gov/downloads/pub/evidence/pdf/melatonin/melatonin.pdfMain Conclusions.
• Evidence suggests that melatonin is not effective in treating most primary sleep disorders
with short-term use, although there is some evidence to suggest that melatonin is
effective in treating delayed sleep phase syndrome with short-term use.
• Evidence suggests that melatonin is not effective in treating most secondary sleep
disorders with short-term use.
• No evidence suggests that melatonin is effective in alleviating the sleep disturbance
aspect of jet lag and shift-work disorder.
• Evidence suggests that melatonin is safe with short-term use.