I was diagnosed with CLL about a year ago - still on watch and wait. I have been taking D3 for years. Some years ago, my nephrologist determined that my Vitamin D level was low and told me to start on it. However, Vitamin D is something you can overdo. She checked my levels last year and told me to half my dosage. It would be good to ask your doctor to check your Vitamin D level. Some months ago I also started taking Tumeric. I asked my oncologist if there are any supplements I should be taking; she said "no". Have any of your oncologists suggested any supplements?