Scientists know more than 60 varieties of pineapple - "Giant Q", "Monte Lirio", "Queen", "Singapore", "Sweet Cayenne" and others. March 12 is World Pineapple Day. The fiber-rich fruit pulp contains a daily dose of vitamin C and up to 75% of the norm for manganese. Regular use of this gift of tropical nature helps strengthen the nervous and immune systems, improve the functioning of the gastrointestinal tract, reduce blood viscosity and cleanse the walls of blood vessels.