High glycemic foods make the major blood vessel of our upper arms swell out or expand from internal pressure, according to new research. This brachial artery is the most convenient place that scientists and doctors have to measure how elastic our arteries are.

The elasticity of our arteries anywhere in our body is a measure of our heart health. When the walls of an artery anywhere in our body expand suddenly, this can lead to heart disease or sudden death.

Those of us who have diabetes need to...