I have been consuming prunes for years because they are a super powered food. There are beneficial for many reasons. I have tried many different varieties, and Sunsweet Amaz!n (sic) Prunes which are available consistently in a “value pack” (i.e. 24 oz.) at my local Walmart are the winners. They are California prunes and always juicy and soft. If you look at the calcium on the nutritional data label, it doesn’t look like there is an impressive amount in there. But I am sticking with them. Much healthier than processed food if you need something sweet. The package says to refrigerate after opening. I never do that, and I have never had any mold issues. Outside the fridge they do not dehydrate.