It is all anonymous.
The reason I asked is because collectively someone might recognise some symptom what he or she or their friend or relative had and if so the OP could feed that back to her friend, and if the friend so chose, the friend could ask the doctor.
For example, I am a vegan, so when I had a regular well-man blood test I asked if a vitamin B12 test would be done. As I had asked it was done each time and although it was in range it was going down so I started havimg a litre of Alpro unsweetened soya drink, which has vitamin fortification (including vitamin B12) each day and it went up fine. If I had not asked I might well have gradually got a lower and lower vitamin B12 level.
Yet what is interesting is that the nurse told me that when people have a blood test that vitamin B12 is not usually checked.
So maybe if the Op's friend asked if a vitamin B12 check has been done, maybe the answer would be 'no'. Maybe worth doing.
Vitamin B12 level depends on vitamin B12 being in the food supply and upon it being absorbed in the final part of the small intestine. If the absorbing process is not working properly then that could lead to a low vitamin B12 level.
I am not a clinician. I was just trying to help. I suppose I could have just not asked and not bothered.
A test for coeliac disease is often done routinely, but it might be worth checking that it has been done.