澳大利亚营养专家埃万格琳·曼齐奥里斯建议，男性每日应摄入30克膳食纤维，女性应摄入25克1。然而，澳大利亚人的实际摄入量远低于推荐标准，男性平均仅为21克，女性约为18克1。这一差距反映出公众摄入不足的普遍现象，仅约5%的澳大利亚人满足每日5份蔬菜的最低要求1。
曼齐奥里斯强调，增加纤维摄入需要循序渐进，指出"不应一天内从0增加到40克纤维，应逐步增加"1。她特别建议优先选择全食物作为纤维来源，包括水果、蔬菜、豆类、坚果和种子，而非依赖补充剂1。膳食纤维分为三种类型：可溶纤维（如燕麦、大麦）、不溶纤维（如全谷物）和抗性淀粉（如煮沸后冷却的土豆）1。
充足的膳食纤维摄入与降低心脏病、某些癌症和糖尿病风险相关1。同时，专家也提醒过量纤维可能导致胀气和便秘等问题1。
Australians are falling significantly short of recommended dietary fiber consumption, according to nutrition guidance. The suggested daily intake is 30 grams for men and 25 grams for women 1, yet Australian men consume only about 21 grams on average and women about 18 grams 1. This gap reflects a broader nutritional challenge: only approximately 5% of Australians meet the minimum vegetable requirement of five servings per day 1.
Evangeline Mantzioris, a nutrition expert, emphasizes that fiber should come from whole foods such as fruits, vegetables, legumes, nuts, and seeds rather than supplements 1. She cautions against abrupt increases in fiber consumption, stating that individuals should not increase from zero to 40 grams of fiber in a single day but instead increase intake gradually 1. Fiber comes in three types—soluble fiber found in oats and barley, insoluble fiber in whole grains, and resistant starch in boiled and cooled potatoes 1—each offering distinct health benefits.
Adequate dietary fiber intake is associated with reduced risk of heart disease, certain cancers, and diabetes 1. The widespread fiber deficit represents a significant public health concern that warrants increased attention to whole-food sources.
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