Jonathon Maguire, St. Michael's Hospital (IMAGE) St. Michael's Hospital Caption Children who are breastfeeding after their first birthday should take a vitamin D supplement to prevent health problems such as rickets, new research suggests. This holds true even if children are eating solid foods in addition to breastfeeding, said Dr. Jonathon Maguire, a pediatrician and researcher at St. Michael's Hospital. Credit Courtesy of St. Michael's Hospital Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.