6 下列有關飲食纖維（dietary fiber）之敘述，何者為非？

水溶性之纖維（例如fruit pectins）是用來治療便祕的

水溶性之纖維很容易被腸內菌發酵而產生短鏈脂肪酸（short-chain fatty acid）

水溶性之纖維可造成糞便體積加大（bulky stool）之效果

腸內菌只能部分發酵葉菜類食物中之植物纖維（cellulose）

A and C answer

two type of dietary fiber. take note.

Soluble fiber absorbs water to become a gelatinous, viscous substance and is fermented by bacteria in the digestive tract. Insoluble fiber has bulking action and is not fermented,^[3] although a major dietary insoluble fiber source, lignin, may alter the fate and metabolism of soluble fibers

Dietary fiber or Dietary fibre or sometimes roughage is the indigestible portion of plant foods having two main components:

• soluble (prebiotic, viscous) fiber that is readily fermented in the colon into gases and physiologically active byproducts, and
• insoluble fiber that is metabolically inert, absorbing water throughout the digestive system and easing defecation

• Both Applies to both soluble and insoluble fiber
• Soluble Applies to soluble fiber only
• Insoluble Applies to insoluble fiber only

Functions	Benefits[25][26]
Adds bulk to your diet, making you feel full faster	May reduce appetite
Attracts water and turns to gel during digestion, trapping carbohydrates and slowing absorption of glucose[27]	Lowers variance in blood sugar levels
Lowers total and LDL cholesterol	Reduces risk of heart disease
Regulates blood sugar	May reduce onset risk or symptoms of metabolic syndrome and diabetes
Speeds the passage of foods through the digestive system	Facilitates regularity
Adds bulk to the stool	Alleviates constipation
Balances intestinal pH[28] and stimulates intestinal fermentation production of short-chain fatty acids	May reduce risk of colorectal cancer[