Eating more fiber helps your blood sugar and insulin stay steady after meals, which in turn helps your kidneys handle salt better and keeps your blood pressure in a healthy range.
Evidence from Studies
Supporting (2)
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Modulatory effects of ingesting dietary fiber and protein before carbohydrates on postprandial interstitial glucose responses.
The study shows that eating fiber before carbs helps control blood sugar spikes, which supports part of the claim. But it doesn’t test whether this actually lowers blood pressure.
The study shows that a high-fiber diet helps lower blood pressure and improves kidney function in older rats, but it doesn’t show that this happens because of changes in blood sugar or insulin like the claim says.
Contradicting (0)
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Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.