Refined bread is the bread that has had the bran and germ removed from the grain. These two parts of the grain are the most nutritious and are able to provide the best benefits to the body.
Grains that have been refined are often only made of the endosperm. This part of the grain carries nearly no nutritional value, although it is extremely high in carbohydrates. Since it provides little nutritional value, iron and vitamin B are sometimes added back to the refined grain. Grains that have had these important nutrients added back to them are referred to as enriched grains. A popular example of an enriched grain is enriched white flour.
A person that eats a diet high in refined grains is more at risk for type 2 diabetes. These grains can also contribute to higher instances of cardiovascular disease and high blood pressure. People who eat a lot of refined grains are more likely to overeat and become obese. A diet that is high in nutritious whole grains, grains that have not had the bran and germ removed from them, will be at a lower risk for many diseases. People who switch from refined grains to whole grains may be able to improve arthritis symptoms.