Kangaroos are endemic to Australia. The Australian government estimates that 34.3 million kangaroos lived within the commercial harvest areas of Australia in 2011, up from 25.1 million one year earlier. As with the terms wallaroo and wallaby, kangaroo refers to a polyphyletic grouping of species. All three refer to members of the same taxonomic family, Macropodidae, and are distinguished according to size. The largest species in the family are called kangaroos and the smallest are generally called wallabies.
Vitamin B12 is an essential water-soluble vitamin that is commonly found in a variety of foods, such as fish, shellfish, meat, eggs, and dairy products. Vitamin B12 is frequently used in combination with other B vitamins in a vitamin B complex formulation.
Share. Vitamin B12, also known as cyanocobalamin, is an essential nutrient in the family complex of the eight B vitamins. Food is the primary source for this nutrient, with supplements being the secondary source for some people. Vitamin B12 is structurally the largest and most complex of all the vitamins known to man.hare. Vitamin B12, also known as cyanocobalamin, is an essential nutrient in the family complex of the eight B vitamins. Food is the primary source for this nutrient, with supplements being the secondary source for some people. Vitamin B12 is structurally the largest and most complex of all the vitamins known to man.