We mentioned high blood pressure; if your magnesium levels go down or your blood vessels constrict you get high blood pressure. Insulin also causes the retention of sodium, which causes the retention of fluid, which causes high blood pressure and fluid retention: congestive heart failure.
One of the strongest stimulants of the sympathetic nervous system is a high level of insulin. What does all of this do to the heart? Not very good things.
There was a solid study done a couple of years ago that showed that heart attacks are two to three times more likely to happen after a high-carbohydrate meal and are specifically NOT likely after a high-fat meal.
Why is that?
Because the immediate effects of raising your blood sugar from a high-carbohydrate meal is a raise in insulin. This immediately triggers the sympathetic nervous system, which will cause arterial spasm, or constriction of the arteries. If you anyone is prone to a heart attack, this is when they are going to get it.
