While a whole potato would seem on the surface to be a reasonably healthy choice compared with processed foods, spuds are a dud when it comes to their effect on your blood glucose level. The Linus Pauling Institute’s website explains that volunteers receive 50 grams of a test food such as a potato, and a control food such as pure glucose that contains exactly the same amount of carbohydrate, on a later day. The glycemic index varies depending on the type of potato -- Harvard Health Publications reports in its listing of the glycemic index of more than 100 foods. J Am Diet Assoc. It is safe to choose low Glycemic Index varieties when it comes to sweet potatoes and stick to boiling or steaming it for consumption instead of baking, roasting, frying, or using other methods. Glycemic index of potato is affected by various factors, which include the genetic makeup of variety, amylose content, type and ratio of starches, cooking method, and the presence of other ingredients consumed with them including fiber, fat, and protein. In order to identify those potatoes which exert a low glycemic impact after processing, eight early potato varieties and four processing methods were evaluated for their total starch content, amylose content, rapidly digestible starch (RDS), slowly digestible starch (SDS), and resistant starch (RS), estimated glycemic index (eGI), glycemic load (eGL) as well as their relationship among each other. Not only that, but the new low glycemic index variety could create new market opportunities for potato growers. Am J Clin Nutr. The glycemic index varies depending on the type of potato -- Harvard Health Publications reports in its listing of the glycemic index of more than 100 foods. MSU currently has six varieties that have a lower glycemic index than Russet Burbank or Yukon Gold potatoes, which are rated high on the glycemic index. Potatoes, flesh and skin, raw *all the values are displayed for the amount of 100 grams. The eight potato varieties exhibited a wide range in GI values from 56 to 94. To understand how a complex carbohydrate-rich food like a potato acts in your body, you need to know its glycemic index (GI). The glycemic index … Russet potatoes have been historically classified as high on the GI; however, this classification either from studies using potato varieties from outside the United States or incorrect methods for measuring GI. Individuals who wish to minimize dietary glycemic index can be advised to precook potatoes and consume them cold or reheated. Foods with lower glycemic index values tend to produce lower blood insulin levels, in addition to lower blood sugar levels, according to Harvard Health Publications. This makes a fully loaded baked potato interesting again. Using glucose to represent 100 on the glycemic index scale, boiled white potatoes have a glycemic index of 82, instant mashed potatoes have a value of 85, and sweet potatoes a value of 70. Grains and Starchy Vegetables. They found that potatoes with a waxy texture had medium glycemic index values, while those with a floury consistency had higher glycemic index values. Usually the glycemic index of potatoes is higher than 70, but it depends on the variety… That means anyone watching their carbohydrate intake can literally have their potatoes and eat them too. 2014;100(1):218-32. doi:10.3945/ajcn.113.079533, Jacobs S, Harmon BE, Boushey CJ, et al. Potato nutrition, glycemic index, calories and serving size. Andean potato cultivars (Solanum tuberosum L.) as a source of antioxidant and mineral micronutrients. Glycemic Index: 60, Calories:77, Net carbs: 17.49, Protein: 2.05. Potatoes actually rank closer to table sugar, which consists of glucose and fructose, than to other starchy foods that contain long and complex chains of glucose, according to the Linus Pauling Institute. To lower the overall GI of potatoes, eat them with: Fat - Olive oil, butter, sour cream or avocados will lower the GI. One study found that when protein and fat are added to foods … Using glucose to represent 100 on the glycemic index scale, boiled white potatoes have a glycemic index of 82, instant mashed potatoes have a value of 85, and sweet potatoes a value of 70. The table below contains nutritional information for 100 g of different potato varieties.As you can see, the 4 different types of potato above are very similar nutritionally. Potatoes actually rank closer to table sugar, which consists of glucose and fructose, than to other starchy foods that contain long and complex chains of glucose, according to the Linus Pauling Institute. A regular baked white potato has a GI score of 111, which ranks even higher than pure glucose. Potatoes are thought to have a high glycemic index, and so there are health and fitness professionals that steer people away from them. Source: USDA. Volunteers’ blood is drawn before eating and for several hours after eating, and blood glucose is measured at regular intervals. When developing the variety, Agrico worked with partners in Australia, where the potato variety was marketed in 2010. Purple Potatoes: “These are considered to be part of the sweet potato family, but instead of being … The GI values of the canned new potato and boiled Desiree potato were significantly different (P = 0.047). American Diabetes Association. Journal of Agricultural and Food Chemistry 55 no.2 (2007): 366–378. Atkinson, Fiona, et al. Allen, Jonathan C. et al. Study 2: subjects consumed 50 g carbohydrate portions of white bread or potatoes (six different varieties and two different cooking methods). Discovery of a low-glycaemic index potato and relationship with starch digestion in vitro. One of the reasons why the low glycemic index potato’s number is higher when it’s served hot compared to cold is the structure of the starch in the potato changes when it’s heated in a pan of water and then cooled. The Linus Pauling Institute reports that a medium-sized baked Russet potato has a glycemic index of 76. An award-winning writer and editor, Rogue Parrish has worked at the Washington Post, the Baltimore Sun and at newspapers from England to Alaska. The cooking method also alters the glycemic index of a potato. Huckleberry Gold is not only exceptionally high in antioxidants, but this great tasting potato also has a lower glycemic index than other potato varieties. Copyright © 2021 Leaf Group Ltd., all rights reserved. Glycemic index, glycemic load, and risk of type 2 diabetes: Results from 3 large US cohorts and an updated meta-analysis. However, there was also a significant cooking*variety interaction, with cooling having a significantly greater effect in one variety than two of the others (P<0.05). Glycemic Index Database. The country is a global frontrunner in the field of knowledge and research into the role of a low glycemic index (low GI). The Atkins Diet that had people shunning carbohydrates is a well-known example. Carisma is available at supermarket chains Albert Heijn and Emté in the Netherlands. While high GI foods are digested quickly and can cause a big spike in blood glucose and insulin levels in the body, low GI foods digest more slowly, … For each potato variety, the glycaemic index (GI) value was calculated geometrically by expressing the incremental area under the blood glucose curve (IAUC) as a percentage of each subject's average IAUC for the standard food. She's also a property manager and writes on DIY projects. The average size of the tuber was found to correlate with the GI (r = 0.83, P<0.05). (Personal communication) Bonn . The eight potato varieties exhibited a wide range in GI values from 56 to 94. Ýy«SÊ¥#Å/mVÍѕøŸ‡ hâÀWú1ÜÄç!›Ð-¥ÖÅW"ÝÆ^£áŒ¦WQÑf(¿¹'é;™Æ^’ö˜de@@Ôà9ܪ•¾Ä ‚A¢c[µ. A recent study demonstrated why the glycemic index of a food like potatoes is not always an accurate measure of how it will affect a person’s blood sugar. In a 2005 study reported in the "Journal of the American Dietetic Association," they found that boiled red potatoes consumed cold fell in the intermediate range at 56, while roasted California white potatoes at 72 and baked Russet potatoes at 77 fell in the moderately high range. Other reasons why the white potato has been pushed to the side comes from its high Glycemic index score. Determining the glycemic index of a food requires tests on human volunteers to see how the food affects their blood glucose levels. While a whole potato would seem on the surface to be a reasonably healthy choice compared with processed foods, spuds are a dud when it comes to their effect on your blood glucose level. Dr. Brooke Devlin of Australian Catholic University led the study. This world adventurer and travel book author, who graduates summa cum laude in journalism from the University of Maryland, specializes in travel and food -- as well as sports and fitness. Boiled and roasted potatoes have the lowest GI (both 59), while baked potatoes are higher (69) and mashed and instant potatoes have the highest GI (78 and 82, respectively). Br J Nutr. That means diabetics and others watching their carbohydrate intake can have their potatoes and eat them, too. Hodge , AM , English , DR , O'Dea , K & Giles , GG ( 2004 ) Glycemic index and dietary fiber and the risk of type 2 diabetes . For each potato variety, the glycemic index (GI) value was calculated geometrically by expressing the incremental area under the blood glucose curve (IAUC) as a percentage of each subject's average IAUC for the standard food. Advanced Nutrition Search; Diet Analysis ☰ Advanced Nutrition Search | Diet Analysis. To determine the effect of variety and cooking method on glycemic response and glycemic index of common North American potatoes. 2017. VARIeTy oR oRIGIn: The GI of potatoes can vary greatly depending upon the variety as well as their origin (where they were grown). Study 1: subjects consumed 200 g Russet or white potatoes … There are several food combinations that significantly lower the glycemic index of potatoes. In other words, you can slow the rate of digestion down when you eat potatoes with other foods. REFERENCES: https://pubmed.ncbi.nlm.nih.gov/24000051/ https://pubmed.ncbi.nlm.nih.gov/22895968/ https://pubmed.ncbi.nlm.nih.gov/26272174/ Glycemic index of potatoes commonly consumed in North America. ANOVA showed, no main effect of potato variety, but a significant main effect of cooling with cold potatoes having a lower GI than freshly cooked or reheated potatoes (P<0.05). Using glucose to represent 100 on the glycemic index scale, boiled white potatoes have a glycemic index of 82, instant mashed potatoes have a value of 85, and sweet potatoes a value of 70. 2005;105(4):557-62. doi:10.1016/j.jada.2005.01.003, Vega-López S, Venn BJ, Slavin JL. Glycemic index values were calculated. The glycemic index varies depending on the type of potato -- Harvard Health Publications reports in its listing of the glycemic index of more than 100 foods. Potatoes fall into the moderately high to high ranges on the glycemic index scale, which measures the effects of foods on blood glucose. Sweet potatoes can have a low, medium, or high glycemic index depending on how they’re cooked and prepared. It is clear that both the method of cooking and variety of potato can affect Glycemic index. The glycemic index of potatoes is influenced by variety and method of cooking and US Russet potatoes have only a moderately high glycemic index. Hambloch, C (2005) US Potato Varieties Used in GI Analyses Are Generally Characterised by Higher Starch Contents than Potatoes Commonly Consumed in Germany. Glycemic index or GI is a relatively new way of measuring the impact of foods containing carbohydrates on blood sugar. Most potatoes mainly contain carbohydrate with a little bit of protein and almost no fat. Further, small potatoes have a … Researchers at the University of Toronto looked at the glycemic index of potatoes as it is affected by cooking method. Subjects. Open Nutrition Journal 6 (2012). “Looking at the other foods eaten with the potato is also important, as you were thinking. Boiled potatoes have 20-25% less glycemic load than baked and baked potatoes. The high range included instant mashed potatoes at 88 and boiled red potatoes at 89. Conclusions: Potatoes, regardless of variety, cooking method and maturity, have exceptionally high GI values. From a health perspective, if you are not training in high-energy demanding workouts small waxy potatoes are preferable to larger varieties, such as Russets, because they have a lower starch content and glycemic index (GI). This means that the change in blood glucose over time after eating a baked potato is 76 percent of the change in blood glucose that occurs after eating the same amount of carbohydrate as pure glucose. The GI of potatoes is highly variable and depends on a variety of factors including the potato type, origin, processing and preparation.1. 2017. CONTEXT. What was most interesting was when a red potato was boiled, refrigerated, and consumed cold the next day, the Glycemic index plummeted 37% from the upper end of a high Glycemic index food (89) to one point away from a classification of a low Glycemic index food (56)(see Table 2). // Leaf Group Lifestyle, Nutritional Difference Between Red Potatoes & Brown Potatoes, Linus Pauling Institute: Glycemic Index and Glycemic Load, Harvard Health Publications: Glycemic Index and Glycemic Load for 100+ Foods, Journal of the American Dietetic Association: Glycemic Index of Potatoes Commonly Consumed in North America, The British Journal of Nutrition: Glycaemic Index Values for Commercially Available Potatoes in Great Britain, Ek KL, Wang S, Copeland L, Brand-Miller JC. Glycemic index of sweet potato as affected by cooking methods. 2018;10(10). Nutrients. 2014;111(4):699-705. doi:10.1017/S0007114513003048, Fernandes G, Velangi A, Wolever TM. Andre, Christelle, et al. 2015;58(1):98-112. doi:10.1007/s00125-014-3404-8. Potato variety and the GI and GL Both the GI and GL can vary by potato variety and cooking method. First of all, potatoes can be found in colored varieties including, red, yellow, and purple. A priori-defined diet quality indexes and risk of type 2 diabetes: The Multiethnic Cohort. University of Sydney, Australia. A team of Canadian plant and nutritional scientists is working on new varieties that might make health-conscious consumers give potatoes a second look. Sweet potatoes and purple potatoes also have about a 20-35% lower glycemic load than white potatoes, and a russet potato has the highest glycemic load of all. The GI of the potato was calculated as the AUC of the potato expressed as a percentage of the individual's average AUC of the white bread. Despite being rich in nutrients, vitamins and minerals, potatoes are often the subject of negative publicity. If you want to lower the glycemic index of the potatoes in your diet, precook the potatoes and consume them cold or reheated, recommends nutritionists at Oxford Brookes University in England who tested eight varieties of potatoes commonly eaten in the United Kingdom. Potato chips, often criticized for processing that adds fats and sodium, actually have a lower glycemic index than other forms of potatoes -- at a value of 51. doi:10.3390/nu10101361, Bhupathiraju SN, Tobias DK, Malik VS, et al. Richest in Potassium: 425mg (9% of DV), Vitamin C: 20mg (22% of DV). Diabetologia. Relevance of the glycemic index and glycemic load for body weight, diabetes, and cardiovascular disease. In both studies meals were consumed after a 10- to 12-hour overnight fast and finger-prick capillary-blood glucose was measured before and at intervals for 2 hours after consumption. Read article about Low Glycemic Potatoes. 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