Thanks again for the advice. My doctor has now requested me to have my urine tested towards the end of my next round of treatment. This wasn’t discussed in my consultation with her so I don’t know what she’s looking for. The urine tests she has requested are for protein electrophoresis and vitamin D. I’m baffled by the latter as I thought Vitamin D wasn’t excreted in urine. A sample tube containing powedered Boric Acid has been provided. Would you be able to shed any light on it?