In our last blog we talked about Glycemic Index. Now let’s talk about Glycemic load. For all of you who commented on the GI of Watermelon, I have good news for you.
We learned last time that the Glycemic Index of food gives us an estimate of how different foods impact our blood sugar level, but we also need to consider the quantity of the food we eat and the portion sizes. For this we speak to Glycemic Load.
Glycemic Load takes into consideration not just the Glycemic Index of a food group but also the quantity of carbohydrates contained in the food.
To calculate the GL, we use this formula.
(GI value of the food × the quantity of carbohydrates of the serving in grams)
So, let’s go back to Watermelon as this is a really good example of the importance of considering both GI and GL for foods. The GI for watermelon is pretty high, somewhere in the 80s but the carbohydrate content in watermelon is so low that the GL is low and therefore has only a minimal effect on blood sugar