Bootstrap's CSS is built on Less, a preprocessor with additional functionality like variables, mixins, and functions for compiling CSS. Those looking to use the source Less files instead of our compiled CSS files can make use of the numerous variables and mixins we use throughout the framework.
Oysters contain more zinc per serving than any other food, but red meat and poultry provide the majority of zinc in the American diet. Other good food sources include beans, nuts, certain types of seafood (such as crab and lobster), whole grains, fortified breakfast cereals, and dairy products [2,11].
Shellfish and red meat are both very high in zinc, but there are also a variety of plant sources of zinc that can easily keep you in the green. These include beans, nuts, whole grains, and seeds like pumpkin, sunflower, sesame and poppy seeds. Many breakfast cereals, tortillas and other baked items that contain fortified flours now also contain zinc.