Culture and Sports / Life Science / Outer Space / Society
Bones, joints, and muscles undergo considerably less stress in weightlessness than normal gravity, causing the calcium in bone cells to be leached from the body. Calcium foods, also known as "cal foods", were developed as a way to replace this lost calcium. Examples include capsules containing crushed eggshells and milk containing casein phosphopeptides. A famous dish in calcium cuisine consists of mixing one of these with soybeans and seaweed, both of which are particularly high in calcium.
Many others methods have been developed for replacing calcium, which tends to be lost easily when living in outer space. Almost all food and drink consumed in space is either naturally high in calcium or is supplemented with calcium. One can also find products such as calcium chewing gum and candy, calcium carbonated beverages, and calcium seasonings.