RE: What's for dinner?
You are correct. There is no vegetable source for vitamin B12, for example, --not one that can adequately fulfill nutritional needs.
In principle, I am against veganism because it does not provide adequate nutrition. Even worse, veganism is a 'rich man's' experiment with their health.
Vegetarianism that includes dairy and eggs can provide adequate nutrition, however. The main problem with vegetarianism is making sure that one consumes all the various nutrients that one needs.
The Indian vegetarian diet of rice, beans, and dairy works pretty well and has been modified culturally all over the world. When someone tells me that they are a vegetarian and their diet consists of these 3 foods, then I have respect for them.
If they tell me they are vegetarian or vegan, but that they do not like beans---well then--I hope they won't get tooo sick as the years wear on.
:-P
Many people who experiment with diets actually put their health at risk. The body needs, first of all, a balanced diet, and all sorts of fashionable options ... it is not in vain that a person has incisors, canines and chewing teeth :-))
There is this documentary on Netflix about dieting for weightloss and health. I shut it off immediately after they insisted that one could get their daily fat requirement from green leafy vegetables.
It reminds me of those mothers who wont feed their children carrots because they have sugar in them.
But I wonder ... what type of food do vegetarians classify insects as? :-))
Whether they like it or not, some of the insects get into their stomach with greens :)
The natives of southern countries understand a lot about insect meat))
Haha! Yes, a lot of insects die from large scale vegetable production. I suppose that organic farming reduces these deaths, but so far, organic farming does not produce enough food to go around for everyone.
I have a friend in Mexico that loves roasted crickets. Blech is all I can say.
You have to live according to your nature and not come up with all sorts of fashionable tricks :)