@madkm When I placed that into a Google search, it shows there are a few small studies done. Results appear to be inconclusive overall, but you can find results that will support either direction you want to see!

Are you diagnosed with multiple myeloma? For me, I now limit my coffee consumption more because it does tend to upset my digestive tract, and seems to contribute to negative side effects of my medications. Anything to keep my body happy is the way I want to go. How much coffee are you drinking a day?
Ginger