The use of wheat dates back 75,000 years. Grains are the seed heads of grass plants. Over time, certain species of grasses were found to produce seeds that people preferred over others. Major grain categories in the world are wheat, rice, corn, barley, oats, and rye. Oats and barley are used mainly as animal feed, but it is also used for molting and baking.
Wheat is used both for human consumption and livestock feed.
Smaller amounts of rye, linseed sunflowers, lavender and now even lupins are also grown. Dry field peas, one of the pulse crops are used for both human and animal consumption. Wheat flour is a good source of complex carbohydrate, the most efficient source of energy available to the human body. Protein Wheat foods are moderate sources of incomplete protein. This means that while wheat and other cereal grains may contain all eight of the amino acids necessary for good health, not all eight are found at adequate levels.