A recent study presented at NUTRITION 2021 LIVE ONLINE reveals that only 7% of adults in the United States are meeting the recommended daily intake of dietary fiber. The findings indicate that just 5% of men and 9% of women consume the suggested amount of fiber, which is crucial for reducing the risk of chronic diseases such as heart disease and diabetes.
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Derek Miketinas, PhD, RD, an assistant professor at Texas Woman’s University and lead author of the study, emphasized that these results highlight the importance of incorporating fiber-rich foods—like whole grains, fruits, and vegetables—into one’s diet to mitigate health risks. He noted that fewer than 1 in 10 U.S. adults achieve their daily fiber recommendations, particularly concerning for those with diabetes who face higher heart disease risks.
Fiber, a carbohydrate that the body cannot digest, aids in digestion and offers numerous cardiovascular benefits. Research suggests that adequate fiber intake can lower cholesterol, reduce blood pressure, and help prevent diabetes by improving blood sugar levels.
The study analyzed data from over 14,600 U.S. adults who participated in the National Health and Nutrition Examination Survey (NHANES) from 2013 to 2018. Fiber intake was assessed through dietary questionnaires, while diabetes status was self-reported and confirmed with hemoglobin A1c (HbA1c) levels. Unlike previous studies, this analysis employed advanced statistical methods to estimate typical fiber intake, taking into account various influencing factors.
Current health guidelines recommend a daily fiber intake of 14 grams for every 1,000 calories consumed. The study found that, on average, women consumed 9.9 g/1,000 kcal, and men consumed 8.7 g/1,000 kcal. Adults with diabetes had slightly higher figures, with women at 10.3 g/1,000 kcal and men at 9.6 g/1,000 kcal, yet still below recommended levels.
For a balanced diet, women should aim for about 25 grams of fiber daily (for a 2,000 calorie diet), while men should target 38 grams (for a 2,500 calorie diet), with lower amounts recommended for those over 50. This typically entails a good mix of fruits, vegetables, and whole grains; for example, pearled barley provides 6 grams of fiber per cup, compared to less than 2 grams in white rice.
Miketinas stated that these findings not only shed light on Americans' dietary habits but can also inform future research on chronic disease prevention. Preliminary analysis indicates that higher fiber intake is significantly linked to reduced markers for heart and kidney disease among adults with diabetes.
Miketinas will present this research in an on-demand poster session during the event, which runs from June 7 to June 10, 2021. It’s important to note that although these findings have been evaluated by a committee of experts, they have not yet undergone the peer review process typically required for publication in scientific journals.