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Claim
Strong Support
causal
Analysis v4

In men with coronary artery disease, replacing refined rice with whole grain and legume powder for 16 weeks lowers levels of two biomarkers of oxidative stress in the blood and urine by about 28%.

56
Pro
0
Against

Mechanism

Synthesis from 1 study

How it works

Eating whole grains and legumes instead of white rice makes blood sugar rise slower, which tells the body to make less insulin. This reduces the production of harmful free radicals. At the same time, these foods provide natural antioxidants that mop up any remaining radicals. Together, this cuts...

Most probable mechanism

In Simple Terms

When people eat whole grains and legumes instead of refined rice, their blood sugar rises more slowly, which tells their pancreas to release less insulin. Over time, this makes their cells more responsive to insulin, which lowers the amount of free radicals produced in their body. At the same time, whole grains and legumes provide natural antioxidants that directly neutralize any remaining free radicals. Together, these actions reduce damage to fats in the blood and cell membranes, which is measured as lower levels of malondialdehyde and 8-epi-prostaglandin F2α.

Causal chain
1

Dietary fiber and complex carbohydrates in whole grain and legume powder resist rapid enzymatic digestion, slowing glucose absorption into the bloodstream

Verified by multiple studies
which leads to
2

Slower glucose absorption reduces postprandial hyperglycemia and diminishes demand for insulin secretion

Verified by multiple studies
which leads to
3

Chronic reduction in insulin demand improves insulin receptor sensitivity in peripheral tissues

Verified by multiple studies
which leads to
4

Improved insulin sensitivity reduces mitochondrial overproduction of reactive oxygen species and decreases pro-oxidant signaling pathways

Supported by evidence
which leads to
5

Whole grain and legume powder increases intake of antioxidant compounds including α-tocopherol, retinol, and α-carotene

Verified by multiple studies
which leads to
6

These antioxidants donate electrons to neutralize lipid peroxyl radicals, preventing propagation of lipid peroxidation in cell membranes and LDL particles

Verified by multiple studies
which leads to
7

Reduced lipid peroxidation lowers the formation of malondialdehyde and 8-epi-prostaglandin F2α as end-products

Verified by multiple studies

Less supported by current evidence, but not ruled out

In Simple Terms

Lower levels of homocysteine in the blood reduce the production of free radicals inside blood vessel walls, which decreases damage to fats in the bloodstream.

Causal chain
1

Improved insulin sensitivity enhances cellular metabolism of homocysteine through transsulfuration pathways

Supported by evidence
which leads to
2

Reduced plasma homocysteine concentration decreases endothelial generation of reactive oxygen species

Supported by evidence
which leads to
3

Lower endothelial oxidative stress reduces lipid peroxidation in circulating lipoproteins

Supported by evidence

Evidence from Studies

Supporting (1)

56

Community contributions welcome

56

Consumption of Whole Grain and Legume Powder Reduces Insulin Demand, Lipid Peroxidation, and Plasma Homocysteine Concentrations in Patients With Coronary Artery Disease: Randomized Controlled Clinical Trial

Randomized Controlled Trial
Human
2001 Dec

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

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.

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Source Study

Consumption of Whole Grain and Legume Powder Reduces Insulin Demand, Lipid Peroxidation, and Plasma Homocysteine Concentrations in Patients With Coronary Artery Disease: Randomized Controlled Clinical Trial

Score: 56
DOI: 10.1161/HQ1201.100258

Similar Assertions

In men with coronary artery disease, replacing refined rice with whole grain and legume powder for 16 weeks raises blood levels of α-carotene, retinol, and α-tocopherol by 11% to 40%, reflecting higher antioxidant levels and better nutrient retention or less oxidative loss.

56
0
88%

In men with coronary artery disease, substituting refined rice with whole grain and legume powder for 16 weeks raises the level of n-6 fatty acids in blood cell membranes by 14%, which changes the physical properties of the membranes and affects inflammatory signaling molecules.

56
0
82%

In men with coronary artery disease, replacing refined rice with an equal amount of whole grain and legume powder daily for 16 weeks lowers fasting blood glucose by 24% and fasting insulin by 14%, improves insulin sensitivity, and reduces the total glucose and insulin response during a sugar tolerance test.

56
0
80%

In men with coronary artery disease, substituting refined rice with whole grain and legume powder for 16 weeks lowers plasma homocysteine levels by about 32%, regardless of folate level changes.

56
0
78%