Cereals: Essential Staples in Global Nutrition and Innovation

Since the dawn of agricultural production in prehistoric times, cereals have been pivotal in sustaining human nutrition and supplying essential proteins. As members of the grass family (Gramineae), cereals produce edible grains utilized as food by both humans and livestock. The most widely cultivated and consumed cereals include rice, wheat, barley, oats, maize (corn), sorghum, rye, and various millets. Among these, corn, rice, and wheat stand out as the most significant due to their global prevalence and dietary importance.

In recent years, scientific advancements have introduced triticale, a novel cereal resulting from the hybridization of wheat and rye, followed by chromosome doubling in the hybrid. This innovation exemplifies the continuous efforts to enhance cereal crops' nutritional value and adaptability. Additionally, grains from other grasses, such as teff, are sporadically incorporated into human diets, broadening the spectrum of cereal consumption.

Cereals remain unparalleled in their contribution to global food security, providing more sustenance for human consumption than any other crop. The primary component of cereals is carbohydrates, with crude fiber and starch being predominant. While the nutritive value of fiber may be limited, its role in facilitating intestinal motility is indispensable. Modern dietary research underscores the importance of dietary fiber, which has been shown to reduce blood cholesterol levels and mitigate the risk of colon cancer.

Whole grains, in particular, are esteemed for their high dietary fiber content, essential fatty acids, and a plethora of vital nutrients. The incorporation of whole grains into diets is increasingly advocated for their comprehensive health benefits. This paradigm shift towards whole grains reflects a broader understanding of their multifaceted role in promoting cardiovascular health, managing weight, and preventing chronic diseases.

In conclusion, cereals' evolution from ancient staples to modern dietary essentials underscores their enduring significance. Continuous scientific innovation and a growing emphasis on whole grains ensure that cereals will remain integral to global nutrition, supporting both human health and agricultural sustainability.
Cereals: Essential Staples in Global Nutrition and Innovation

Starch content in cereal grains

Cereal grains have been the principal component of human diet for thousands of years and have played a major role in shaping human civilization. Around the world, rice, wheat, and maize, and to a lesser extent, sorghum and millets are important staples critical to daily survival of billions of people. The chemical composition of cereal grains (moisture 11–14%) is characterized by the high content of carbohydrates.

The major carbohydrate is starch (55–70%) followed by minor constituents such as arabinoxylans (1.5–8%), b -glucans (0.5–7%), sugars (~3%), cellulose (~2.5%), and glucofructans (~1%).

Cereal grains supply most of their food energy as starch. Cereal and grain legumes together may contribute 70% to 90% of the calories in the daily diet and a almost similar of dietary protein.

Starch occurs only in the endosperm and is present in granular form. Endosperm is the largest part of grain. It composed mainly of starch. Outer layer of endosperm is called the aleurone layer. Starch consists of the two water-insoluble homoglucans amylose and amylopectin. Cereal starches are typically composed of 25–28% amylose and 72–75% amylopectin.

Mutant genotypes may have an altered amylose/amylopectin ratio. Amylose is a predominantly linear molecule linked by α-1, 4 bonds and amylopectin is a highly branched polymer with branch points linked by α-1, 6 bonds. It is the ratio of amylose to amylopectin and fine structure of these polymers that give native starch its distinctive properties

Wheat has the larger, lenticular shaped A-starch granules and the smaller, spherical B-starch granules. A-starch granule type makes up 90% of the weight but less than 20% of the number of starch granules in wheat and some other cereals such as maize, and sorghum.
Starch content in cereal grains

Instant Hot Cereal for breakfast

Hot breakfast cereals account for 7% of all breakfast cereals. The most commonly consumed hot breakfast cereals are oatmeal, farina, hominy or corn grits, cream of rice and bulgur.

They are available in three forms: regular, quick cooking, and instant. Instant Hot Cereal helps get the rest of the body going after the brain cells have started working.

It definitely people gets started in a better frame of mind. It is an excellent way to start the day.

Hot cereals are usually made from unrefined grains – most notably oats and wheat. Many hot cereals aren’t fortified with vitamins and minerals and so contain only the nutrients found in the grain itself. These include fiber, B vitamins, vitamin E, iron, zinc, calcium, selenium and magnesium.

Hot cereals made from whole grains are excellent.  Hot cereal can make a healthy breakfast, but the one claiming to contain fruit may offer little actual fruit, with more fruit flavoring and artificial colors.

Many people do not eat hot cereal because they think it’s too time consuming to make. If have microwave it should take no longer thon three to four minutes start to finish.

Hot cereals are often among the breakfast menu items at sit-down restaurants, cafeterias, and hotels. Oat meal, the most common of the hot cereal, is a healthy choice.
Instant Hot Cereal for breakfast 

Genetic Biotechnology of Cereal

In the mid 1990s, plant biotechnology burst onto the scene in world agriculture, beginning a second ‘green revolution’ and precipitating one of the great public debates of this era.

Primitive forms of cereal grains were among the first pants domesticated by early humans more than 10000 years ago during the Neolithic age when agriculture gradually replaced hunting and gathering.

The evolution of the different types of wheat was mainly by chance by occurred with a little help from human ancestors who choose to cultivate seed from the best plants they could find in nature.

By the best what they were looking for was the variety that would give them the highest yields in their climate and on their land.

The search for the best variety is still going, but most of the wheat varieties grown today exist as the direct results of man’s intervention.

They are the results of thousands focused breeding trial in which the superior varieties are selected out of the existing genetic pool (much as our ancestors did), but these varieties are then deliberately developed into thousands of modern hybrids by using just three species (T. aestivum, T. sphaeroccum, and T. compactum). 

To ensure that the correct genetic combination is achieved, the breeder first removes the unripe anthers (pollen-containing organs) from one parent plant. Next the plants “contained” to prevent pollination from any undesirable source.

As soon as the stigmas are ready to be pollinated, the breeder introduces pollen from the desired second “parent” plant.

The seed derived from this first generation hybrid are all identical, but subsequent generations will exhibit a range of characteristics from which seed the desired characteristics can be selected. Once selected, they can be “amplified” through successive plantings into a pure genetic line.

A major factor that limits the world’s cereal production is abiotic caused by drought, high salinity or low temperature.

Plants respond to these environmental changes through a number of homeostatic mechanism that maintain the water balance and the integrity of tissues. This includes several regulatory mechanism that activate the expression of tolerance effector genes.
Genetic Biotechnology of Cereal

Flavor coating cereal

The cereal processing industry is placing more emphasis in the variety and flavor quality of snack foods.

In the early days if the breakfast cereal industry, pioneer manufacturers depended in consumers to given up the flavor of cereal in their bowls by topping off their flakes, granules, shreds, or oat meal with sugar or honey and more sophisticated flavor and texture additives, such as blueberries, nuts, or maple syrup.

The list was limited only by the consumer’s imagination. However, it was not long before these variations gave birth to prepackaged product extensions starting with presweetened flakes or puffs and continuing with more complicated products, such as fruit-filled shredded grain biscuits.

Fruits, such as raisins have been added to cereals for many years, but in the search for new products, other inclusions such as nuts, freeze dried yoghurt and granola (a cereal mix itself) have been added.

Also, the need to nutritionally fortify cereals soon arose, as consumers began to view cereals as a complete meal rather than part of a well-rounded breakfast including eggs, meat, and juice.

It is generally felt that the quality of cereal would be rather enhanced of the products base itself could be either totally or partially flavored.

These are applied in a various ways including sprays and coating drums. Sprays are typically applied onto a moving conveyor belt of product.

For many applications, the most efficient means of coating the product is to apply a spray inside a rotating drum where the product is gently tumbled.

Further complicating the process in some cases is the need to add water to flake products or remove it from them to maintain a proper moisture level and thus ensure good texture and freshness over an extended period of time.

Flavors are best applied as part of a sugar coating on the cereal. Brown flavors are common in cereals, and are not as susceptible to volatilization as fruit flavors.

As new generation cereal products were developed and the demand for them increased, new production technique evolved. In many cases these new generation cereals were and are using an existing product as the base (flakes, puffed grains, or shredded biscuits).

The coating layers can prevent oxidation of lipoid ingredients, colorants and flavors of food products such as nuts, confectionary, fried products and color produce.

The moisture barriers property can also be utilized to prevent moisture migration between heterogeneous food product ingredients for example between raisin and breakfast cereals.
Flavor coating cereal

Nutrition of cereal

Cereals, the most important plant foods in the human diet are derived from seeds of domesticated members of the Graminease, the grasses.

Long before people learned to cultivate the grasses that are today’s cereal grain, they relied upon such grains as a source of nutrients.

It is thus only natural that breakfast cereals made from the cereal grains through modern processing techniques have become primarily contributors of nutrients to our diets.

Now, cereals remain the staple food in most does and in many parts of rural Africa and Asia provide more than 70% of the energy intake.

The nutrients provided by this first meal of the day include those that are indigenous to the cereal grains as well as some that are added in the manufacture of the cereal.

The nutrient contribution of cereal applies to all age groups. Processed cereals are usually the first solid food fed to infants and the cereal feeding frequently is the first of the day.

Carbohydrate is the main substance in cereals. Cereals have crude fiber and starch. Though the nutritive value of fiber is not much it performs over other valuable functions which enable the motility of intestine.

No one can doubts on the popularity of breakfast cereals among children; all one has to do is look on store shelves at the large number of breakfast cereals designed to appeal to children.

According to one study, among children aged 5-12, those who ate ready to eat cereal three or more times a week consumed significantly less fat and cholesterol and more fiber, B-vitamins and vitamins A and D than those who ate no ready to eat cereal at breakfast.

Cereal also present an important source of protein. Cereal protein is especially valuable in diets when we consider complementation of amino acids between various plant sources.

The Nutrition Facts panel on a box of breakfast cereal shows an abundance of vitamin and minerals, many of which have been added through fortification.

Cereal made contributions to adult as well. One study shows that breakfast consumption patterns of adult aged 50 and over and concluded that for all age and sex classes, consumption of ready to eat cereal at breakfast increased the average daily intake of all vitamins and minerals particularly those identified as under consumed by elderly individuals.

Adding milk or yoghurt makes cereal a great vehicle for delivering calcium and other nutrients in milk.

For this reason, cereal labels often give the Nutrition Facts for cereal only and for cereal with added milk.

With consumer awareness of the importance of whole grains, granolas have become popular, These typically contain vegetable oil to make them tastier. Thus a cup of commercial prepared granola can easily provide 600 calories or more.
Nutrition of cereal 

Breakfast Cereal

Breakfast cereal have been define as “processed grains for human consumption”. The manufacturing of breakfast cereal was one of the earliest commercial applications of extrusion cooking technology and remains one of the most widespread.

The breakfast cereal market has grown since its early beginnings and is now categorized into ready-to-eat cereals (cold cereal) and hot cereals.

Hence the most important raw materials in any breakfast cereal is grain. Most commonly used are corn, wheat, oats, rice and barley. Other ingredients often included in the manufacturing process are salt, sweeteners, flavoring agents, coloring agents, vitamins, minerals and preservatives.

The portions drops well below this in many ready to eat cereals, and less than 50% in presweetened products having nutritive sweeteners )sucrose, or fructose, dextrose, and other corn-based products) as substantial constituents.

Breakfast cereals can be a modest but significant source of protein especially in those products containing protein additives, for which the cereal products are excellent carriers.

In broad terms , then, breakfast cereal ingredients may be classified as:
1) grains or grain products,
2) sweeteners, caloric or otherwise
3) other flavoring or texturizing macro ingredients
4) micro-ingredients for flavor or color, micro ingredients for nutritional fortification and shelf life preservation.
Breakfast Cereal

Nutritive Value of Cereal

Cereal is any member of the grass family (Gramineae) which produced edible grains usable as food by humans and livestock.

Cereals provide more food for human consumption than any other crops. All cereal grains have fairly similar structure and nutritive value, although the shape and size of the seed may be different.

Common cereals are rice, wheat, barley, oats, maize (corn), sorghum, rye, and certain millets, with corn, rice, and wheat being the most important.

Cereal grains supply most of their food energy as starch. Cereal and grain legumes together may contribute 70% to 90% of the calories in the daily diet and a almost similar of of dietary protein.

They are also a significant source of protein, though the amino acid balance is not optimal. Whole grains are good sources of dietary fiber, essential fatty acids, and other important nutrients.

Rice is the most important of the cereals used as the staple food by more than half of the world’s population.

Rice is eaten as cooked entire grains, although rice flour is also produced. Oats are rolled, ground, or cut into bits (steel-cut oats) and cooked into porridge. Most other cereals are ground into flour or meal, that is milled.

The whole grain of all cereals have a nearly similar composition. On an average, the important cereals contain about 1 g% protein, 1 g% fat, and about 70 g% carbohydrate and yield about 340 kcal energy per 100g.

Bran, which represents 7% of the grain, contain the majority of the grain fiber, essentially cellulose and pentosans. It is a source of B vitamins and phytochemical and 40-70% of the minerals are concentrated in the outer layer.

The endosperm, the main part of the grain (80-85%), contains mostly starch.

Health-conscious people tend to prefer whole grains, which are not milled. Overconsumption of milled cereals is sometimes blamed for obesity. Milled grains do keep better because the outer layers of the grains are rich in rancidity-prone fats.

Chemical composition and nutritive value of cereal grains are affected by variety and location of production.
Nutritive Value of Cereal