Ed,
The National Institutes of Health note there is little strong evidence on specific use of pomegranate juice. Visit the web page below for more info; it was last updated in September 2016.
Federal agencies have taken action against companies selling pomegranate juice and supplements for deceptive advertising and making drug-like claims about the products. For more on this, view the NCCIH Director’s Page entitled Excessive Claims.
On the other hand, respected bladder cancer experts have long extolled the general benefits of fruits, vegetables and juices high in nourishing properties such as anti- oxidants.
Good nutrition can only help, but there are potential drug interactions with pomegranate juice. Check with your doctor.
Best,
Jack
nccih.nih.gov/health/pomegranate/at-a-glance 
