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].
Meat, especially red meat, is a good source of zinc. Mutton provides between 5 to 8 milligrams of zinc per serving, accounting for 30 to 50 percent of daily value. Beef is also a great food for pumping up your zinc levels, as it has more zinc than many other foods.