High dietary fiber intake is strongly associated with a significant reduction in the risk of developing various chronic diseases and with a decrease in overall mortality.

noli's read

The scientific community largely agrees on the benefits of fiber, although it actively debates the strength of the evidence. The study presented is an 'umbrella review' (a synthesis of meta-analyses), a high-level form of observational evidence that is nevertheless limited by its non-interventional nature. Current science, particularly through systematic reviews such as those published in the 'Lancet' or 'Nature', does indeed confirm a robust correlation between high fiber intake and better metabolic and cardiovascular health. However, nuance is required: while the association is deemed 'convincing' by the authors of the cited study, this does not mean 'direct causality' in the strict sense of a randomized controlled trial (RCT). Potential exaggeration lies in the interpretation of these observational data as irrefutable proof, when they may reflect other healthy behaviors linked to a plant-rich diet. In summary, there is a strong consensus on the value of fiber, but scientific rigor requires distinguishing statistical correlation from experimental evidence.

the sources

1. 1Reynolds A et al. 2019
2. 2r/ScientificNutrition