Thanks to all of you who wrote about digestive enzymes. I tried eating an apple or a cucumber before each meal and that helps somewhat with the constipation issue. Then I tried (double strength) digestive enzymes that I got from the health food store. Forty plus years of horrid never-ending constipation ended with one little pill taken before each meal !!!! Whoever said that constipation (in some cases) is caused by mercury destroying digestive enzymes and that it can be helped by taking digestive enzymes is absolutely correct! Everyone with this problem should try it.