Seaweeds such as kelp and dulse provide dozens of minerals,including iodine.
Brazil nuts are rich in selenium. Blackstrap molasses and wheat germ contain substantial magnesium. Organ meats provide substantial iron and potassium. Bones offer calcium, magnesium, phosphorus and other minerals in perfect balance; bone marrow is rich in copper and iron. The advantage to food-derived minerals is that they are easy to assimilate and proportions that living bodies utilize well. Ian Billinghurst based his dog diet on bone because they provide a puppy's most complete and balanced supply of minerals, preventing hip dysplasia , growth defects, wobbler syndrome, dropped hocks, spayed feet and bone cysts. "We have been breeding Great Danes and Rottweilers for years," he explains. "The bone problems our dogs had been experiencing disappeared the moment we began to raise our puppies on a bone-based diet." Billinghurst cautions breeders and owners that the larger the breed, the more important it is not to use calcium supplements because these supplements have been and shown to disrupt the balance of minerals needed by the body and exacerbate bone and growth problems.