Since these interactions are relative to the levels of all the other nutrients Vitamin C interacts with, and since these levels vary from one patient to the next, it is not possible to establish a universal Vitamin C overdose amount, or specific Vitamin C side effects that apply to everyone. At the same time, while the potential to clinically overdose on Vitamin C does exist, it is quite rare and not expected to occur at the 250 to 1,000 mg adult intake level considered average for those that regularly self-supplement... Full Text