Does High Insulin Cause High Blood Pressure?
Seven Days of Euglycemic Hyperinsulinemia Induces Insulin Resistance for Glucose Metabolism but Not Hypertension, Elevated Catecholamine Levels, or Increased Sodium Retention in Conscious Normal Rats
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Scientists gave rats extra insulin for 7 days while keeping their blood sugar normal. They wanted to see if high insulin levels cause both insulin resistance (where the body stops responding to insulin) and high blood pressure.
Surprising Findings
Seven days of high insulin caused severe insulin resistance but absolutely no increase in blood pressure
Epidemiological studies have long suggested a link between chronic hyperinsulinemia and hypertension in humans. This controlled experiment in rats found no such connection, suggesting the human association might be correlation, not causation.
Practical Takeaways
Don't assume that managing insulin levels alone will control blood pressure
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Scientists gave rats extra insulin for 7 days while keeping their blood sugar normal. They wanted to see if high insulin levels cause both insulin resistance (where the body stops responding to insulin) and high blood pressure.
Surprising Findings
Seven days of high insulin caused severe insulin resistance but absolutely no increase in blood pressure
Epidemiological studies have long suggested a link between chronic hyperinsulinemia and hypertension in humans. This controlled experiment in rats found no such connection, suggesting the human association might be correlation, not causation.
Practical Takeaways
Don't assume that managing insulin levels alone will control blood pressure
Publication
Journal
Diabetes
Year
1997
Authors
S. Koopmans, L. Ohman, J. Haywood, L. Mandarino, R. DeFronzo
Related Content
Claims (6)
Scientists found that keeping insulin levels artificially high for a week made rats develop severe insulin resistance - their bodies became much worse at processing sugar, with glucose uptake dropping by 39% and sugar storage falling by 62%.
Scientists found that when they kept rats with normal blood sugar on high insulin for a week, their stress hormone levels didn't change at all - they stayed exactly the same.
When researchers gave insulin to healthy rats and measured how their bodies handled glucose, they found no connection between this process and the rats' blood pressure or heart rate. In other words, insulin's effect on sugar processing doesn't seem to affect heart and blood vessel measurements.
Giving rats insulin for a week while keeping their blood sugar normal doesn't change their blood pressure.
When researchers kept insulin levels high but blood sugar normal in rats for a week, the rats' bodies didn't hold onto more sodium than usual - their sodium levels stayed steady at about 0.34 mmol.