Fiber
Dietary fiber supplement supporting gut motility, microbiome diversity, & cardiovascular risk reduction.
womens-healthgut-healthmetabolic-healthlongevity
Evidence last reviewed: 04 Apr 2026
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Biomarkers studied
Outcomes directly measured across the evidence records below
Cardiovascular
LDL Cholesterol
Evidence
2 records
Constipation relief & stool frequency
Adults with functional constipation • Systematic review and meta-analysis of RCTs
PUBMEDModerate
Fiber supplementation significantly increased stool frequency & reduced constipation symptoms; effects were consistent across multiple fiber types.
Dose: —
Citation: van der Schoot A, et al. 2022.
LDL cholesterol reduction
Adults with mild-to-moderate hypercholesterolemia (28 RCTs, n=1,924) • Systematic review and meta-analysis of RCTs
PUBMEDHigh
Psyllium fiber (~10.2 g/day) significantly reduced LDL cholesterol by −0.33 mmol/L, non-HDL cholesterol by −0.39 mmol/L, & apolipoprotein B by −0.05 g/L vs placebo; consistent dose-response across populations.
Dose: 10200 mg
Psyllium is the most studied soluble fiber for lipid outcomes; FDA-qualified health claim for cardiovascular risk reduction.
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