Where can you find medical research on ailments caused by food coloring?
Medical research papers can be found online using google scolar or any of the searchable online collections scopus, science direct etc. Some require subscription and are very expensive due to the commercial interest in the subject matter from pharmacological companies. Perhaps a better idea is to ring and visit your local university library they are likley to hold a collection and most will allow the public to use them after jumping through a few hoops. The question implies that you are not familiar with science research so read with the warning that it is normal for papers to be published showing both sides of an argument and that opinion is formed after weighting the exact methods used in the paper against each other. To form an educated opinion you will have to read many papers and understand the effects of study size and selecting subgroup of the population for study. Understanding scientific papers in context of advances in the field is essential for example opinions will have pro
