Vegetarian dietary habits often begin at an early age. According to a recent survey conducted by Harris Interactive on behalf of the Vegetarian Resource Group, about 3% or 1.4 million U.S. youths between the ages of 8 and 18 are vegetarian, and two-thirds of this group may be classified as vegan.

Earth Day 2010 marks the 40th anniversary of the event that today is recognized across 175 countries around the world and by over 500 million people. Originally the idea of Senator Gaylord Nelson in 1969, the initial goal was to educate children and the environment. Now held on April 22nd, after the first recognized Earth Day in 1970, this day represents a time when many people think about living in a healthier and more sustainable way.

While survey after survey shows growing consumer interest and demand in vegetarian food options, you don’t need to be a market researcher to know that “veg” is in. In fact, all you need to do is scan through the most recent headlines to see for yourself how vegetarianism and veganism are becoming an intrinsic part of the American lifestyle.

The healthy food trend is everywhere — calorie counts appear on menus, restaurants and fast food places feature “light” menus, and more and more media attention is directed toward research studies touting the critical importance of a healthy diet. So what does “healthy” mean to consumers?