Browse evidence-based analysis of health-related claims and assertions
Processed foods contain engineered combinations of high sodium and refined carbohydrates, which together cause acute plasma volume expansion and chronic hormonal sodium retention, leading to sustained hypertension.
Assertion
Chronic insulin resistance impairs endothelial function by reducing nitric oxide production, leading to arterial stiffness and increased vascular resistance.
Insulin resistance results in chronically elevated insulin levels, causing the kidneys to continuously retain sodium due to persistent hormonal signaling.
Elevated uric acid levels directly increase renal sodium reabsorption without insulin involvement.
Fructose metabolism in the liver produces uric acid, which impairs endothelial function by reducing nitric oxide availability and arterial relaxation.
Chronic elevation of insulin activates the sympathetic nervous system, leading to increased heart rate, cardiac output, and peripheral vasoconstriction, thereby raising blood pressure.
Insulin signaling causes the kidneys to retain sodium, independent of dietary sodium intake.
Sodium intake increases plasma volume through osmotic water retention, leading to higher blood pressure due to increased fluid in a closed circulatory system.
People with a condition called primary aldosteronism have 6% more fluid outside their cells than others, but their sodium excretion doesn't affect this fluid level.
Descriptive
People with high blood pressure who aren't taking medication have similar sodium excretion and body fluid levels outside their cells as people with normal blood pressure.
The levels of various blood chemicals like electrolytes, hormones, and kidney markers don't change based on how much sodium someone excretes in their urine.
Correlational
Sodium excretion levels don't affect blood pressure, heart rate, or how much blood the heart pumps when lying down.
People who excrete more sodium in their urine tend to have more fluid outside their cells.
After starting dapagliflozin, the kidneys produced more aldosterone hormone for a few days, which might help the body retain salt, but this effect didn't last after two weeks.
People with type 2 diabetes and healthy kidneys lost about 0.8 kg after a few days and 1.8 kg after two weeks of taking dapagliflozin, likely due to water loss.
Dapagliflozin made the kidneys less able to reabsorb sodium in the first part of the nephron, which is why more lithium was excreted, showing the drug's effect on kidney function.
As expected, dapagliflozin caused people with type 2 diabetes to excrete much more sugar in their urine, which is how the drug works to lower blood sugar.
Dapagliflozin didn't significantly change the amount of fluid in the bloodstream of people with type 2 diabetes and healthy kidneys, even after two weeks of treatment.
Dapagliflozin caused a temporary decrease in body fluid volume outside cells after 4 days, but this effect went away after two weeks in people with type 2 diabetes and healthy kidneys.
Even though dapagliflozin lowered blood pressure, it didn't cause people with type 2 diabetes and healthy kidneys to excrete more salt in their urine when they ate a controlled amount of salt.
Taking dapagliflozin for two weeks lowered blood pressure by about 6-7 points in people with type 2 diabetes and healthy kidneys, even when they ate a controlled amount of salt.
Mice with kidney-specific PER1 removal have higher levels of a kidney signaling molecule called endothelin-1. This finding is from the abstract summary - full study details were not available
Removing PER1 from mouse kidneys changes how genes related to body clock and stress hormones work in the adrenal glands. This finding is from the abstract summary - full study details were not available
Mice with kidney-specific PER1 removal show higher levels of a hormone that regulates salt and blood pressure. This finding is from the abstract summary - full study details were not available