Render your own lard for cooking. It adds amazing flavor to potatoes, eggs, and endless roast vegetables. Our pigs live outside so are able to store Vitamin D in their fat, but I do not have tested data on that.
Our pigs spend their lives on pasture, moving to fresh grass frequently. They dig up roots, roll in the mud, run through the field, and live happy lives. Their activity level, lack of stress, and excellent diet produce pork with outstanding flavor.