Position of the American Dietetic Association: health implications of dietary fiber.
Level 5 - mechanism / opinion, no new human data
Professional association position statement and practice guideline based on expert consensus and narrative review.
PubMed 18953766 · doi:10.1016/j.jada.2008.08.007
What was done
The American Dietetic Association published a position statement and practice guideline reviewing the health implications of dietary fiber, recommended intake levels, physiological mechanisms, and food sources.
What was found
Dietary Reference Intakes recommend 14 g of dietary fiber per 1,000 kcal, equating to 25 g/day for adult women and 38 g/day for adult men based on protection against cardiovascular disease in epidemiologic studies. Typical intake in the United States is 15 g/day. High-fiber diets are associated with reduced chronic disease risk factors, increased satiety, and lower body weights, whereas evidence for cancer reduction is mixed. Few commercial fiber supplements have been verified for physiological effectiveness in clinical studies.
Why it matters
This position paper establishes clinical and dietary benchmarks for fiber intake, emphasizing whole plant foods to address the substantial gap between recommended and actual population intake.
Limits
The statement is a narrative review and expert consensus rather than a systematic review. Fiber intake recommendations are calculated from energy intake estimates rather than interventional clinical trials, and appropriate amounts for pediatric, critically ill, and elderly populations remain undetermined.
Cited by
- supports The recommended daily intake of dietary fiber is approximately 30 grams, but most people only consume around 12 to 15 grams per day.