GL refers to glycemic load, which simply means how a food affects your blood sugar levels. Low-GL foods release their sugars slowly into your blood helping support steady energy levels while high GL foods can cause a spike in blood sugar leading to energy spikes followed by energy crashes. Common snack goods and “junk” food are often high GL. Low-GL foods include most whole foods, such as vegetables and fruit, whole grains, nuts and seeds, meat, fish and eggs, and beans and lentils.