American Association of Family and Consumer Sciences (AAFCS) Practice Test

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Which type of fiber is found in oats and beans and is known to lower cholesterol levels?

Insoluble fiber
Soluble fiber
Resistant starch
Functional fiber

The correct answer is: Soluble fiber

Soluble fiber is the type of fiber that is prevalent in oats and beans and is recognized for its beneficial effects on cholesterol levels. This form of fiber dissolves in water and forms a gel-like substance in the digestive tract. It plays a significant role in lowering blood cholesterol levels by binding to cholesterol and bile acids and facilitating their excretion from the body. When soluble fiber is consumed, it can help reduce the absorption of cholesterol into the bloodstream, thus lowering overall cholesterol levels and improving heart health. In contrast, insoluble fiber, which is found in whole grains and vegetables, primarily aids in digestive health by adding bulk to stool and promoting regular bowel movements, but it does not have the same cholesterol-lowering effects. Resistant starch refers to a type of starch that is not fully digested in the small intestine and can contribute to gastrointestinal health, but it does not specifically target cholesterol. Functional fiber, on the other hand, includes laboratory-made fibers or those added to foods for health benefits, but it’s not necessarily the source identified in oats and beans that is linked to cholesterol reduction.