True. Children and adults can both benefit from having a dietician.
A dietitian (dietician) is an expert in dietetics; human nutrition and the regulation of diet. He or she advises people on what to eat in order to lead a healthy lifestyle or to achieve a specific health-related goal.
Children usually do not think of their overall well being when eating. All they are concerned about is being fed food that tastes good preferably sweet. They do not think about the required nutrients they find in their food nor do they think about the future health consequences of their food choices. Thus, a dietician is needed.
Adults need dieticians too. Mostly because they already are experiencing negative consequences from unhealthy eating practices since childhood. They need dieticians to lower the negative effect and bring their health back to normal.
