I have been using the tablet form of Natrol Melatonin for over 2 years now and have never had a problem. On the bottle it says: calcium 28 mg 3% (as dicalcium phosphate) Phosphorus 20 mg (as dicalcium phosphate) Melatonin 1 mg Other ingredients: Cellulose, Stearic Acid, Cellulose Gum, Silica, and Magnesium Stearate. This is the information on the bottle. I know there is a liquid form but it has alcohol in it and I don't use it. I have 6 kids on it now with no ill effects. I wonder what the difference is. Curious. I hope all is well with the rest of your kids. It is horrible to loose any of them no matter the cause. Terry and 15 Frolicking Fur Children [Posted in FML issue 4360]