Answered by: Thea
I have some resources that should help you get started on being able to bolster your case. First, note the following quote from a position paper from the ADA: “It is the position of the American Dietetic Association that appropriately planned vegetarian diets, including total vegetarian or vegan diets, are healthful, nutritionally adequate, and may provide health benefits in the prevention and treatment of certain diseases. Well-planned vegetarian diets are appropriate for individuals during all stages of the life cycle, including pregnancy, lactation, infancy, childhood, and adolescence, and for athletes.”
Also note this quote from Dr. Greger’s book, How Not To Die, page 411-412: “Vitamin B12-fortified plant-based diets can offer health benefits for all stages of the life cycle. [When] Dr. Benjamin Spock, the most esteemed pediatrician of all time,…died at ninety-four, he advocated children be raised on a plant-based diet with no exposure to meat or dairy products. … ‘Children who grow up getting their nutrition from plant foods have a tremendous health advantage and are much less likely to develop health problems as the years go by.'”
PCRM is the Physician’s Committee For Responsible Medicine, headed up by Dr. Barnard. Dr. Greger has mentioned Dr. Barnard and PCRM favorably in posts and his book. Here are two articles [1, 2] from PCRM that I think contains the type of information you are looking for.
I’ll also refer you to a site called the Vegetarian Resource Group, VRG. Their articles are usually very well researched and Dr. Greger has mentioned VRG favorably at least once. VRG has a whole section on kids on their website. Here’s the main page. Scroll down to the Nutrition section.
This is one of my favorite articles on that page, which starts with babies and goes on up.
Finally, Becoming Vegan, Express Edition is a great over-all reference book for the whole family. It also has an entire chapter on children and what to feed. It also includes an age-based chart where you can get ideas on how much of each of the main nutrients your child needs at various ages. The authors of that book have been guest bloggers here on NutritionFacts. They are very well respected and extremely knowledgeable about nutrition science and how it applies to all ages.