We live in a world where everyone has an opinion on what works or doesn't work for them nutritionally. Many people start a 'health' diet without enough personal research into long-term effects, possible side effects, inadequate nutrition, and the effect it might have on children. This article shows up a concern that has actually cost children their lives.
http://www.thehealthyhomeeconomist.com/12-year-old-vegan-has-the-degenerating-bones-of-80-year-old/?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+TheHealthyHomeEconomist+%28The+Healthy+Home+Economist%29
Yes, we need to eat better in order to live better. Most healthy eating is thoughtful and fine for most everyone but, like anything in life, going to far in one direction can be hazardous for your health.
When we decided to try going gluten-free, I did some research and the one 'problem' could be a lack of the B vitamins given the lack of wheat products. We added a multiple B vitamin to the diet and have not experienced any problems. We are, however, vigilant and keep possibilities in mind. Actually, omitting wheat isn't taking away a really main component in the diet as all the meats, fruits, starches, and vegetables are still in play. Going totally vegan without any milk protein, however, could have it's problems as the article indicated.
I think that adults are free to eat whatever diet they want to but need to take more consideration into the possible effect on babies and children. Going gluten-free has been very helpful to my husband. We have not, however, limited wheat products for our children.
The world is a fantastic place to live in when it comes to what we eat and what is available to eat. We just need to do our homework and make proven, sensible choices.