Question from a non-vegetarian

I hope you won't mind if I ask a question about this lifestyle. I am concerned about my daughter. She is 23 and has recently become a vegetarian. She is living with me at this time, so I can see that she eats almost nothing at all. For instance, half a cucumber and a few slices of bread per day, along with an apple sometimes. Is this typical for vegetarians? I also work with a vegetarian, and she is quite thin, but she does seem to eat a balanced diet.

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