Hiatal hernias actually results from the stomach pushing up through the diaphragm. There are several ways to deal with this. Some chiropractors can push the stomach back through. Not all chiropractors know how to do this so you may have to call around to find one that knows how to do this.
Another way to do this at home that I have heard of numerous times and makes a lot of sense is to drink enough water to fill the stomach. Then step up on a strong box or something else that sits about a foot or two off the ground then hop off. The principle is that the weight of the water will pull the stomach downward when you hit the ground pulling the protruding part of the stomach back through the diaphragm.
As for the prostate zinc is really important. You can get zinc from raw pumpkin seeds, which also provide essential fatty acids that also aid the prostate. Otherwise supplements can be used for a total of 50mg daily. For selenium I recommend 200mcg 3 times daily with meals. Try to find one combined with 2mg copper if possible. Saw palmetto and pygeum are both pretty good, but jiaogulan is more effective. Nettle leaf and root, bee pollen and licorice root are also very good choices.