Thank you for your question.
Given the fact that cod liver oil is a natural product, not closely regulated by the food and drug administration, there may amounts of mercury and heavy metals in cod liver oil that is unsafe for children under the age of 19.
Thank you for consulting AskTheDoctor.com
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.