Mixed
Systematic evidence mapping of human intervention studies reveals that specific fiber types (e.g., guar gum, psyllium) and physiological health outcomes (e.g., LDL cholesterol, postprandial glycemia) are well-documented, whereas gaps exist for other fiber-outcome pairings.
To target specific health goals like lowering cholesterol or managing blood sugar, look for supplements or foods containing specific, well-studied fibers like psyllium or guar gum, rather than generic 'fiber' blends. The database highlights that evidence strength varies significantly by fiber type.
The 919 entries detailed a total of 1483 fiber exposures... guar gum was the most frequently studied exposure (8.7%)... Total and LDL cholesterol (16.9%)... and postprandial glycemia/insulinemia (14.5%) were the top three outcome groups studied.
Why this rating
The database aggregates high-quality RCTs, but the paper itself is a methodological description of the database, not a primary efficacy trial.
Source
Development of a Publicly Available, Comprehensive Database of Fiber and Health Outcomes: Rationale and Methods
Kara A. Livingston et al. · PLoS ONE · 2016
DOI 10.1371/journal.pone.0156961
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
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- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →