Crude fiber is a measure of the quantity of indigestible cellulose, pentosans, lignin, and other similar components present in foods. It represents the plant materials' residue that remains after solvent extraction and subsequent digestion with dilute acid and alkali. These components, although offering little nutritional value, are crucial for providing the bulk necessary for proper peristaltic action in the intestinal tract.
Determining crude fiber content is essential for evaluating the efficiency of milling processes, particularly in separating bran from the starchy endosperm of grains. This measurement is also useful in the chemical analysis of the succulence of fresh vegetables and fruits, with over-mature products typically showing increased levels of crude fiber.
While the term "crude fiber" was once commonly used, the concept evolved significantly in the late 1970s when the term "dietary fiber" gained acceptance. Initially, fiber was not considered important to health, hence the primitive term "crude fiber" was used. However, recent research into dietary fiber's roles has led to a reevaluation of traditional concepts. Dietary fiber, a term that might be a misnomer, refers to the non-digestible portion of food, which may or may not have a fibrous structure.
Dietary fiber is a complex mixture of different substances, with major components including cellulose, hemicellulose, pectin, and lignin. Cellulose, a glucose polymer, forms the primary material of plant cell walls, while hemicellulose is a shorter version of cellulose. Pectin acts as the glue binding plant cells together, and lignin is found in the woody cell walls of plants.
Fiber offers a variety of health benefits and is essential in reducing the risk of chronic diseases such as diabetes, obesity, cardiovascular disease, and diverticulitis. One of its significant functions is to lower the concentration of low-density lipoprotein (LDL) cholesterol in the blood, possibly by binding with bile acids, with the lignin fraction identified as a potential binding agent.
Additionally, fiber plays a crucial role in promoting digestive health. Its ability to bind water helps soften stools, thereby facilitating the elimination of waste from the gastrointestinal tract. This property not only aids in preventing constipation but also helps maintain overall bowel health.
In light of the evolving understanding of dietary fiber, it is clear that these indigestible components play a more vital role in human health than previously thought. The shift from the term "crude fiber" to "dietary fiber" reflects this increased recognition of fiber's significance, emphasizing its essential contributions to a balanced diet and overall well-being.
The Evolution and Importance of Dietary Fiber
FOOD SCIENCE
The primary goal of food is to promote our health and general well-being. Food science entails comprehending the characteristics, composition, and behaviors of food constituents in different situations, such as storage, handling, and consumption.
July 26, 2024
Subscribe to:
Posts (Atom)
The Most Popular Posts
-
Ash or mineral content is the portion of the food or any organic material that remains after it is burned at very high temperatures. The a...
-
Crude fiber is a measure of the quantity of indigestible cellulose, pentosans, lignin, and other components of this type in present foods. ...
-
Gelatinization occurs when starch granules are heated in a liquid. It is responsible for the thickening of food systems. The process is an i...
-
Crude fat is the term used to refer to the crude mixture of fat-soluble material present in a sample. Crude fat also known as the ether ext...
-
Vegetables are crucial for maintaining good health due to their rich nutrient profile. Historically, plant-based foods have been integral to...
-
-
-
Most American today are overfed yet undernourished, which eventually leads to obesity and poor health. The answer to those pervasive problem is simply to ...