True education on the dietary adjustments that need to be made when cutting out meat are ideal, but also stating that it is quote "REALLY not that difficult" just come off as rude.
The thing is, there tends to be a perception that it's more difficult than it is...it's really not, although it's important to eat a variety of foods. But it depends on the individual. If you have absorption problems, then you're going to have to take it more into account and try to find the most bioavailable sources, be careful about when you eat calcium rich foods vs iron rich foods, make sure to get extra vitamin C, etc. That could really be true even if you eat meat. I know a fair number of people who have had more success with liquid supplements like Floradix, might be worth checking out, might be more easily absorbed for some. Cooking in cast iron is also good.
As a culture we also tend to be stuck in a certain mindset about food: in order to be a meal, there has to be a piece of meat, some white pasta or rice or potatoes or bread. A larger variety of whole grains like quinoa and brown rice or pasta are better and some find they have more lasting energy. Mix with some legumes and colorful veggies like bell peppers, broccoli, carrots. Frozen vegetables (frozen seperately, not as a block) are readily available, reasonably priced, and also nutritious as the nutrients are generally preserved. Sprinkling into pasta sauce, homemade breads, etc, can also add nutrients, protein, fiber. It isn't tasteless but in something like pasta sauce it's not very noticeable. I've been eating
Link Removed kind of pasta for awhile - they have a 7 grain blend and also one enriched with calcium, reasonably priced and available at the supermarket.
Picking out anemia isn't that hard because there are some fairly tell tale signs. Tiredness, etc. Again this is more common in females and children and the onset of menstruation could trigger it for some.
But I maintain that for a lot of a girls, the main problem may really be eating too little or irregularly. This of course can be a problem even unintentionally, for example if you're at school all day and there is five hours between lunch and breakfast and you forgot a snack. I also think that high schools rarely have healthy meals available and many high schoolers will opt for soda, fries, cookies, or chips rather than meal (which probably isn't all that great in the first place or vegetarian). In fact I'd go so far as to say in many places I would not plan for a vegetarian child or teen to buy their lunch based on my experience. They should plan to bring it from home (and could buy supplemental snacks if desired). If kids become vegetarian and just replace food with snacks because they don't access to vegetarian meals, then that's not healthy. It's also common in my experience for any teenager to sometimes replace meals with snacks so just not healthy period.