When people with normal insulin sensitivity consume glucose, their sympathetic nervous system becomes more active; in people with insulin resistance, the same glucose intake does not produce this...

When people with higher body fat consume glucose, their insulin levels rise, but the resulting increase in nerve activity that controls blood vessel constriction and heart rate is smaller than in people with lower body fat.

In people with obesity, consuming glucose leads to a larger increase in insulin than expected, while the nervous system's response in the muscles is weaker than normal. This mismatch may be linked to how the body responds to insulin.

When insulin goes up after eating carbs, it lines up with bigger blood flow to muscles, looser blood vessels, and more nerve signals telling vessels to tighten—suggesting insulin might be linked to all these changes happening together.

In obese adults with metabolic syndrome, higher insulin levels after eating are linked to lower activity in the part of the nervous system that prepares the body for stress or action.

In obese adults with metabolic syndrome, those with insulin resistance show a weaker and slower increase in nerve activity and norepinephrine release after consuming a glucose drink, compared to those without insulin resistance, suggesting differences in how the autonomic nervous system responds to sugar.