A balanced diet consists of carbohydrates, fats, protein, vitamins,
minerals and water. Carbohydrate provides us with energy. Fats
(lipids) with healthy cell membranes and an energy reserve. Proteins
are essential for growth and repair or body tissues. Vitamins are
needed to keep our cells working properly and minerals build molecules
in your cells, such as calcium (Hudson, 1998). Although water is
humans most essential component of our diet as we can survive weeks
without food though only days without water. In a sense you could say
that humans are what we drink as seventy percent of our bodies, and of
most organisms are made up of water. Water is essential for every
chemical reaction that occurs in the body. It makes up blood and is
used to dilute toxins and be excreted as urine. The reason humans eat
the foods that we do, and cannot share food groups with other animal,
such as cows is because we do not have the enzymes to be able to
digest these things. Cows are able to eat grass, which is very hard to
digest because they have four stomachs and can allow the grass to
ferment and break down before it is then digested. Humans eat the
foods that their digestive system can cope with.