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].
Food Sources of Zinc. The best way to avoid consuming too much zinc is to avoid taking dietary supplements. Focus on eating zinc-rich foods instead. Good sources of zinc include beef, shellfish such as crab or lobster, chicken, cheese, milk and kidney beans. A 3-ounce serving of roast beef provides 7 milligrams of zinc, or about 47 percent of an adult's RDA of zinc.