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

What type of fiber helps speed digestion and may reduce the risk of colon cancer?

1. Soluble fiber

2. Insoluble fiber

3. Dietary fiber

4. Fermentable fiber

The correct answer is: Insoluble fiber

Insoluble fiber plays a significant role in speeding up digestion and enhancing intestinal health. It adds bulk to the stool and helps move food through the digestive tract more efficiently, which is important for regular bowel movements. This increased bulk can help prevent constipation and may reduce the risk of developing conditions like diverticulitis and, potentially, colon cancer. Insoluble fiber is commonly found in foods such as whole grains, nuts, beans, and the skins of fruits and vegetables. By promoting effective digestion and regularity, it can contribute to overall gut health, thereby lowering the risk of colon cancer. In contrast, soluble fiber, which dissolves in water to form a gel-like substance, can help lower cholesterol levels and control blood sugar but does not have the same direct effect on digestive speed as insoluble fiber. Dietary fiber is a broader category that includes both soluble and insoluble types; thus, it does not specifically address the type that aids in speedier digestion. Fermentable fiber pertains to fibers that can be broken down by bacteria in the colon, resulting in the production of gases and short-chain fatty acids, which can have various health benefits, but again, it doesn't focus specifically on the speed of digestion in the same way that insoluble fiber