Hi everyone,
thank you so much for all of the replies and suggestions, I really appreciate your time and kindness. My Daughter has lost a lot of weight recently, though I'm sure she hasn't got an eating disorder, this has been a wake up call for her, she realises now that she wasn't eating nearly enough, and is trying very hard to up the calories.
I know she has low blood pressure and pulse rate, and wonder if these would improve if she were to gain a little weight? My feeling is that she could be anaemic too, it's very difficult for vegetarians to get enough iron, and supplements upset her stomach. She's had blood tests today, and we see the Doctor next week, so I'll post again then, again, thank you so much to all of you!