The authors used data from nearly 9,000 children who were between 6 months and 8 years old and had participated in the TARGet Kids! Cohort between 2008 and 2019. TARGet Kids! is a primary care practice-based research network and cohort study in Toronto. Details on the diets these children ate were according to their parents, who answered whether their children were vegetarian (which included vegans) or non-vegetarian.
At the beginning of the study, 248 children (including 25 vegans) were vegetarian, and 338 more children had become vegetarian sometime later during the study. Children were followed up with for nearly three years on average. There weren’t any significant differences between vegetarian and non-vegetarian children regarding standard BMI, height, serum ferritin levels and vitamin D levels.
However, vegetarian children were nearly twice as likely to be underweight than non-vegetarian children.
Being underweight can be a sign of malnutrition and can indicate that one’s diet isn’t enough to support appropriate growth, according to the study news release. Specific details about dietary intake or quality, and physical activity, weren’t available to the authors — which could influence growth and nutrition.
Studies with longer follow-up periods and information on motivations for eating vegetarian — such as socioeconomic status — would also be helpful for understanding links between children’s development and vegetarianism, the authors said.
The findings highlight “the need for careful dietary planning for children with underweight when considering vegetarian diets,” Maguire said.
“The kids that were underweight both in vegetarian and non-vegetarian (groups) were similar and were younger in age and of Asian descent,” said Amy Kimberlain, a registered dietitian nutritionist and Academy of Nutrition and Dietetics spokesperson. Kimberlain wasn’t involved in the study.
“Ethnicity could certainly have played a part in the weight finding,” said Dr. Maya Adam, a clinical assistant professor in the pediatrics department at Stanford School of Medicine, who wasn’t involved in the study.
Regardless, “it’s important for kids to be monitored for their growth, regardless of their diet,” Kimberlain said. “A vegetarian diet can be a healthy choice for all kids. The key is making sure that it is well planned out. With the help of a registered dietitian nutritionist, kids’ growth can be monitored as well as their nutrients needs to ensure they are being adequately consumed.”
If you and your children are experimenting with eating vegetarian or vegan, having alternative options is important “in case one day they like something and the next day they don’t,” Kimberlain said.