Peanuts Help Control Blood Sugar

Research has shown that peanuts can help control blood sugar in both healthy individuals and those with type 2 diabetes. Peanuts and peanut butter have even been shown to help lessen the spike in blood sugar when paired with high-carbohydrate or high-GL foods.

Peanuts and peanut butter are both low GI and GL foods, as they contain healthy oils, protein, and fiber that have a positive effect on blood sugar control.

The glycemic index (GI) is a point scale used to compare how high your blood sugar and insulin levels spike after eating the same amount of carbohydrates from different foods. Foods that are digested more slowly release sugar gradually into the bloodstream, so they have a lower GI and are healthier. The GI content of foods is measured on a 100-point scale, with 100 representing the highest GI foods. Peanuts have a GI of 14, making them a low GI food.

Another way to measure blood sugar after eating is by assessing the “glycemic load” (GL). This scale also measures blood sugar spikes, but uses the typical serving size of each food item instead of a standard carbohydrate amount, making it an even better tool to show how different foods can affect blood sugar.

Foods with a higher GI and GL can cause blood sugar and insulin to spike soon after eating, and after a meal, blood sugar can then drop even lower than before. This crash in blood sugar can make a person feel tired and hungry for more food, and this rollercoaster cycle of highs and lows can contribute to the development of pre-diabetes and diabetes. In addition, low-GI diets can significantly improve long-term glucose control in people with diabetes, similar to the amounts achieved with medication.

A 2013 study by Reis and colleagues showed that, when eaten in the morning, peanuts and peanut butter positively impact blood sugar control throughout the day for women at high risk for type 2 diabetes. Not only did consuming 1.5 ounces of peanuts or peanut butter at breakfast help to decrease blood sugar spikes early in the day, but effects were also seen hours later when participants showed more even blood sugar control following a high-carbohydrate lunch in the absence of peanuts or peanut butter.

Their findings were later supported by a 2018 study from the University of the Incarnate Word, which investigated the effect of peanut butter consumption with a high glycemic index breakfast on blood sugar. Investigators found that when peanut butter was added to the high glycemic index meal, the spike in blood glucose was significantly lower than without peanut butter. They explained that this effect may be due in part to its high protein and healthy fat content.

Plus, eating peanuts/tree nuts can help with long-term blood sugar control. One study published in Diabetologia showed that eating mixed nuts (including peanuts) in place of high-carbohydrate foods improved long-term blood sugar control and lowered cholesterol in men and women with type 2 diabetes.

Peanuts vs. Almonds

If you think pricier almonds are healthier than peanuts, it’s time to think again. In a study comparing the effects of peanut or almond consumption on the health of diabetic patients, both were found to be equally beneficial.

Two groups of participants, a Peanut group and Almond group, were fed low-carb diets over 12 weeks. Each were instructed to consume approximately 2 servings of peanuts or almonds every day.

After 12 weeks authors found that both groups showed improvement in hemoglobin A1c levels (a marker of long-term glucose control) and glucose levels. In fact, peanuts improved both fasting glucose levels and 2-hr postprandial glucose levels (glucose levels tested 2 hours after a meal).

The authors noted that while nuts are routinely recommended for diabetics to help with glucose control, the higher costs of tree nuts can make them more difficult to acquire for some. Peanuts are a low-cost option that can help to keep diabetics healthy if consumed daily as part of a balanced diet.

Peanuts are a Good Source of Magnesium

Magnesium has been shown to play a role in reducing the risk of diabetes due to its positive relationship with how insulin is released and absorbed in the body. Peanuts contain 12% of the daily value for magnesium, making them a “good source” of the nutrient, according to the Food and Drug Administration (FDA). In one study, individuals who ate peanuts every day for three weeks not only had a higher intake of magnesium, but blood magnesium also improved to above recommended levels.

Clinical studies have shown that when individuals don’t consume enough magnesium, their risk of type 2 diabetes increases.

Magnesium also plays a role in metabolic syndrome, inflammation, and insulin resistance in people of all ages. Studies show an association between magnesium deficiency and insulin resistance in children as well as inflammation and metabolic syndrome in middle-aged and older adults.

Plant Protein Reduces Risk of Type 2 Diabetes

A major study from the Harvard School of Public Health shows that consuming peanuts and peanut butter reduces type 2 diabetes risk (Malik et al., Dietary Protein Intake and Risk of Type 2 Diabetes in US Men and Women, Am J Epidemiol, 2016).

Powerful Plant Protein

Harvard researchers assessed more than 20 years of data following more than 200,000 people in the United States. Their research centered on the relationship between plant and animal protein consumption and type 2 diabetes risk. Investigators found:

  • Study participants who ate high levels of plant protein reduced their risk of type 2 diabetes by 9%.
  • In contrast, those participants with diets higher in animal protein increased their risk of type 2 diabetes by 13% (see graph below)
  • In the study, “whole grains and peanuts and peanut butter were the most commonly consumed major food sources of vegetable protein” (p. 9-10)
Healthy Substitutions Lead to Major Health Benefits in the Future

Substitution of 5% of energy from plant protein (legumes, peanuts, peanut butter, other nuts and whole grains) was made for an equal amount of total carbohydrate, refined carbohydrate, or animal protein. These substitutions resulted in a 19-23% reduced risk of diabetes:

Plant Protein Substitution For:


Total carbohydrate

22% lower risk of diabetes

Refined grains and sugar

19% lower risk

Animal protein

23% lower risk

Substituting peanuts and peanut butter for animal protein, refined grains or potatoes resulted in 7-21% reduced risk of type 2 diabetes.

Substituting peanuts and peanut butter for processed meat resulted in the largest diabetes risk reduction (21%).

Peanuts and Peanut Butter are Healthy Food Choices for Type 2 Diabetes

Guidelines for preventing diabetes include maintaining an appropriate body weight, being physically active, and making healthy food choices.

Peanuts contain not only plant protein (in fact, they are higher in protein than other nuts), but they also contain fiber and polyunsaturated fatty acids. Protein, fiber and fat are crucial foods for maintaining satiety (feeling full) and supporting normal blood sugar levels—these are critical factors in maintaining your weight and preventing diabetes.

Here is a great peanut recipe for diabetics! This recipe is quick, simple and is great for breakfast or a snack. Control your blood sugars all day with these easy to make Peanut Butter Protein Balls:



prep time: 15 MINUTES

additional time: 30 MINUTES

 total time: 45 MINUTES

Made with just 5 ingredients, these quick & easy no bake peanut butter protein balls are packed with protein and healthy fats. A perfect healthy snack idea that adults and kids alike will LOVE!



  1. In a medium mixing bowl, mix all of the ingredients together until smooth.
  2. Use a small 2-teaspoon cookie scoop to portion out the dough, rolling each portion into a ball shape. Dip each ball into the chopped peanuts, as desired.
  3. Place the protein balls on a baking sheet lined with parchment paper, and refrigerate for 30 minutes to firm up.
  4. Store in the refrigerator in an airtight container for up to 2 weeks.

Nutrition information:

YIELD: 12 SERVING SIZE: 2 protein balls 
Amount Per Serving: CALORIES: 166 TOTAL FAT: 11.0g SATURATED FAT: 2.1g CHOLESTEROL: 3.5mg SODIUM: 86.2mg CARBOHYDRATES: 8.7g FIBER: 1.7g SUGAR: 4.8g PROTEIN: 8.7g


Hou YY, Ojo O, Wang LL, Wang Q, Jiang Q, Shao XY, Wang XH. A Randomized Controlled Trial to Compare the Effect of Peanuts and Almonds on the Cardio-Metabolic and Inflammatory Parameters in Patients with Type 2 Diabetes Mellitus. Nutrients. 2018 Oct 23;10(11). pii: E1565. doi: 10.3390/nu10111565. PubMed PMID: 30360498; PubMed Central PMCID: PMC6267433.

Lesley N. Lilly, Cynthia J. Heiss, Sofia F. Maragoudakis, Kelli L. Braden & Scott E. Smith (2018) The Effect of Added Peanut Butter on the Glycemic Response to a High–Glycemic Index Meal: A Pilot Study, Journal of the American College of Nutrition, DOI: 10.1080/07315724.2018.1519404

Jenkins, D.J.A., Kendall, C.W.C., Lamarche, B. et al. Nuts as a replacement for carbohydrates in the diabetic diet: a reanalysis of a randomised controlled trial. Diabetologia (2018) 61: 1734. https://doi.org/10.1007/s00125-018-4628-9

Malik VS, Li Y, Tobias DK, Pan A, Hu FB. Dietary Protein Intake and Risk of Type 2 Diabetes in US Men and Women. Am J Epidemiol. 2016 Apr 15;183(8):715-28. doi: 10.1093/aje/kwv268. Epub 2016 Mar 28. PubMed PMID: 27022032; PubMed Central PMCID: PMC4832052.

Ajala O, English P, Pinkney J. Systematic review and meta-analysis of different dietary approaches to the management of type 2 diabetes. Am J Clin Nutr. 2013 Mar;97(3):505-16. doi: 10.3945/ajcn.112.042457. Epub 2013 Jan 30. Review. PubMed PMID: 23364002.

Reis CE, Ribeiro DN, Costa NM, Bressan J, Alfenas RC, Mattes RD. Acute and second-meal effects of peanuts on glycaemic response and appetite in obese women with high type 2 diabetes risk: a randomised cross-over clinical trial. Br J Nutr. 2013 Jun;109(11):2015-23. doi: 10.1017/S0007114512004217. Epub 2012 Nov 5. PubMed PMID: 23122211.

Dong JY, Xun P, He K, Qin LQ. Magnesium intake and risk of type 2 diabetes: meta-analysis of prospective cohort studies. Diabetes Care. 2011 Sep;34(9):2116-22. doi: 10.2337/dc11-0518. Review. PubMed PMID: 21868780; PubMed Central PMCID: PMC3161260.

Mooren FC, Krüger K, Völker K, Golf SW, Wadepuhl M, Kraus A. Oral magnesium supplementation reduces insulin resistance in non-diabetic subjects – a double-blind, placebo-controlled, randomized trial. Diabetes Obes Metab. 2011 Mar;13(3):281-4. doi: 10.1111/j.1463-1326.2010.01332.x. PubMed PMID: 21205110.

Johnston CS, Buller AJ. Vinegar and peanut products as complementary foods to reduce postprandial glycemia. J Am Diet Assoc. 2005 Dec;105(12):1939-42. PubMed PMID: 16321601.

Song Y, Ridker PM, Manson JE, Cook NR, Buring JE, Liu S. Magnesium intake, C-reactive protein, and the prevalence of metabolic syndrome in middle-aged and older U.S. women. Diabetes Care. 2005 Jun;28(6):1438-44. PubMed PMID: 15920065.

Huerta MG, Roemmich JN, Kington ML, Bovbjerg VE, Weltman AL, Holmes VF, Patrie JT, Rogol AD, Nadler JL. Magnesium deficiency is associated with insulin resistance in obese children. Diabetes Care. 2005 May;28(5):1175-81. PubMed PMID: 15855585.

Alper CM, Mattes RD. Peanut consumption improves indices of cardiovascular disease risk in healthy adults. J Am Coll Nutr. 2003 Apr;22(2):133-41. PubMed PMID: 12672709.

Kirkmeyer SV, Mattes RD. Effects of food attributes on hunger and food intake. Int J Obes Relat Metab Disord. 2000 Sep;24(9):1167-75. PubMed PMID: 11033986.

Salmerón J, Manson JE, Stampfer MJ, Colditz GA, Wing AL, Willett WC. Dietary fiber, glycemic load, and risk of non-insulin-dependent diabetes mellitus in women. JAMA. 1997 Feb 12;277(6):472-7. PubMed PMID: 9020271.

Jenkins DJ, Wolever TM, Taylor RH, Barker H, Fielden H, Baldwin JM, Bowling AC, Newman HC, Jenkins AL, Goff DV. Glycemic index of foods: a physiological basis for carbohydrate exchange. Am J Clin Nutr. 1981 Mar;34(3):362-6. PubMed PMID: 6259925.