I would say they lack protein, because meat is the main source for protein in a persons diet, and if thats taken away then you have to find new ways to get that protein back. Like with eggs and nuts, etc.
-hope this helps :3
Answer:
In order to answer the question i need a story, picture, note, etc... to examine this sara character but you provided nothing but "What possible problems could Sara be experiencing?" Im sorry but you need to add more information about sara.
Explanation: