Ask Your RD – The Glycemic Index of Oats
It’s time to answer another question in our Ask Your RD series. Thanks to our Twitter friend @KitchenParade, we’ve got another great question. @KitchenParade’s question references the Glycemic Index, so before we get to the answer, let’s start with some background information for those who aren’t familiar with the Glycemic Index (GI).
What is the Glycemic Index?
The Glycemic Index rates foods based on how they affect a person’s blood sugar levels. Foods are rated as High (70 or above), Medium (56 to 69) or Low (55 or below) on the index. The lower a food’s GI rating, the less fluctuation in blood sugar and insulin levels it causes.
What are the benefits of eating according to the Glycemic Index?
Some studies have shown that eating a diet that includes mostly low-GI foods and limits high GI foods as well as foods high in saturated fat can decrease the risk of developing Type 2 diabetes and possibly even heart disease. The basic tenets of GI-based diets (eat more whole grains, high-fiber fruits and vegetables and limit sweet treats, refined grains and high-fat foods) are good healthy living guidelines, whether your aware of the GI value of your foods or not.
And now for the question:
Do steel-cut oats have a lower glycemic impact than old-fashioned rolled oats?
It turns out that the GI rating for steel-cut oats and old-fashioned rolled oats is very similar. Both types of oats fall into the Low to Low-Medium range (about 45-59) on the Glycemic Index, depending on the brand and how they’re prepared. So no matter which type of oats you choose to eat, they’ll probably have a very similar affect on your blood sugar and insulin levels.
"Eat well. Live well. Be well."

