Real Advantage Nutrients, located in Frederick, MD has a product called Ultimate Pro Support. The material sent out by this company reads that this product has wonderful results in treating prostate problems.. Can their claim be substantiated?

Most likely not, most "health foods" or suppliments have little evidence and they are not regulated like medication that is prescription.

What prostate troubles do you have, for some just diet can help and there are supplements that have claims to work, but if you have serious prostate issues, you need to see your doctor