Mixed evidenceother
Psyllium for High Blood Pressure
Psyllium's viscous gel may modestly lower blood pressure indirectly through improved insulin sensitivity and weight/lipid effects, and possibly through effects on vascular tone from short-chain fatty acid fermentation byproducts.
How strong is the research?
Mixed evidence
Reported a similar significant systolic reduction (~2.04 mmHg) but, like the 2024 analysis, found diastolic blood pressure was not significantly affected — included here to show the diastolic null result is consistent across two independent meta-analyses, not a one-off.
How much to take
7–20 g