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Radishes, commonly featured in salads and dishes as a crunchy garnish, often take a back seat to more prominent vegetables when it comes to discussions about glycemic impact. However, these root vegetables boast an array of health benefits that extend beyond their conventional culinary role. Rich in nutrients like vitamin C, potassium, and fiber, radishes may contribute to improved digestion and heart health.¹ Furthermore, their low glycemic index makes them a potentially favorable addition to the diets of individuals managing blood sugar levels, particularly those with diabetes. 

In this article, we'll explore the often-overlooked potential of radishes in promoting stable blood sugar levels and overall well-being, shedding light on the unique advantages of incorporating this versatile vegetable into your diet.

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Glycemic Index Table

The nutritional content of radishes per 100g serving includes a glycemic index of approximately 15, indicating a minimal impact on blood sugar levels.² With a carbohydrate content of 3.4g per 100g serving, radishes are considered a low-carb vegetable, making them an ideal choice for those aiming to manage their carbohydrate intake.¹ The glycemic load per serving, calculated by multiplying the glycemic index by the amount of carbohydrates and dividing by 100, is an exceptionally low 0.51, emphasizing the minimal effect of radishes on blood glucose levels. 

The glycemic index (GI) measures how quickly a particular food raises blood sugar levels. Foods with a low GI (55 or less) are digested and absorbed more slowly, resulting in a slower and smaller rise in blood sugar levels. Cooking radishes does not significantly affect their glycemic index, as they are commonly consumed raw, although roasting or boiling might slightly increase the GI due to the breakdown of fiber.

These statistics underline the potential benefits of incorporating radishes into diets, particularly for individuals seeking to manage blood sugar levels and overall carbohydrate intake.

Glycemic Index


Serving Size


Carbohydrate* per Serving (g)

3.4 g

GL per Serving


Nutritional Facts

Radishes are a low-calorie vegetable, rich in nutrients that contribute to overall well-being. A 100-gram serving of radishes contains approximately 16 calories, 3.4 grams of carbohydrates, and 1.6 grams of dietary fiber, making them a suitable choice for individuals aiming to maintain a balanced diet.¹ Additionally, radishes are known for their notable content of vitamins C and B6, potassium, and other essential minerals, which collectively support immune function, heart health, and digestion.

The nutritional information below is for 100 g of radishes.¹


16 kcal


3.40 g


0.67 g


1.6 g


0 mg


B6 (0.08 mg), C (14.81 mg).


39 mg

Total Fat

0.11 g

Is Radish Good for Weight Loss?

Radishes can be a valuable addition to weight loss diets due to their low calorie and high water content, making them a satisfying and hydrating food choice. With approximately 16 calories per 100-gram serving and a significant fiber content of 1.6 grams, radishes can promote a feeling of fullness, potentially reducing overall calorie intake and aiding in weight management.

Additionally, their natural peppery flavor can add zest to dishes without the need for calorie-dense condiments, making them an excellent option for those aiming to maintain a calorie-controlled diet. Integrating radishes into a well-balanced and varied diet, alongside regular exercise, can contribute to a sustainable and effective weight loss regimen.

Is Radish Safe for People Living with Diabetes?

Radishes can be a beneficial addition to the diets of individuals with diabetes due to their low glycemic index and minimal impact on blood sugar levels. With only 3.4 grams of carbohydrates per 100-gram serving, radishes can be incorporated into balanced meal plans for people with diabetes, aiding in managing blood sugar fluctuations.¹ 

Furthermore, their high fiber content may contribute to improved blood sugar control and overall digestive health, supporting individuals in maintaining stable glucose levels. However, it is crucial for diabetics to monitor their overall carbohydrate intake and consult with healthcare providers to ensure radishes fit into their individualized dietary plans.

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While radishes are generally considered safe for consumption, allergic reactions to radishes, though rare, have been reported. Symptoms of radish allergies may include itching, swelling, or hives, and in severe cases, anaphylaxis. Those with known allergies to cruciferous vegetables, such as broccoli or cabbage, may be more susceptible to radish allergies. It's essential for individuals with a history of food allergies or sensitivities to monitor their reactions closely when introducing radishes into their diet and consult with a healthcare professional if any adverse symptoms occur.

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What is Glycemic Index?

The glycemic index (GI) is a measure of how quickly a carbohydrate-containing food raises blood sugar levels compared to a reference food, usually glucose. It ranks foods on a scale from 0 to 100, with higher values indicating a faster rise in blood sugar. The glycemic index (GI) scale is typically categorized as follows: Low GI [55 or less], Medium GI [56-69], High GI [70 or higher]. Foods with a high glycemic index digest rapidly and can cause dramatic fluctuations in blood glucose or glucose spikes.

What is Glycemic Load?

Glycemic load (GL) takes into account both the quality (glycemic index) and quantity (carbohydrate content) of carbohydrates in a specific serving of food. It is a measure of how much a particular food will raise blood sugar levels. GL is calculated by multiplying the glycemic index of a food by its carbohydrate content and dividing it by 100. It provides a more accurate representation of the overall impact of a food on blood sugar compared to the glycemic index alone.

Does Radish Spike Insulin?

There is some evidence to suggest that radish may have a positive effect on insulin levels. Radish contains compounds called anthocyanins, which have been shown to improve insulin sensitivity in animal studies. Additionally, radish is a low-glycemic index food, meaning it does not cause a rapid spike in blood sugar levels, which can lead to insulin resistance over time. However, more research is needed to fully understand the effects of radish on insulin levels in humans.

Is Radish Low Glycemic?

Yes, radish is considered a low glycemic index food, with a score of 15 on the glycemic index scale. This means it has a minimal impact on blood sugar levels.

Can People Living with Diabetes Eat Radish?

Yes, people living with diabetes can eat radish as it is low in calories and carbohydrates, high in fiber, and has a low glycemic index. However, they should monitor their portion sizes and overall carbohydrate intake to maintain their blood sugar levels.

Topics discussed in this article:


  1. USDA FoodData Central. (2019, April 1). Food Details - Radishes, raw. 
  2. The University of Sydney. (2023, May 1). Glycemic Index – Glycemic Index Research and GI News

About the author

It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout.

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About the author

Brittany Barry is a national board-certified health coach and NASM-certified personal trainer based in South Carolina.

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Please note: The Signos team is committed to sharing insightful and actionable health articles that are backed by scientific research, supported by expert reviews, and vetted by experienced health editors. The Signos blog is not intended to diagnose, treat, cure or prevent any disease. If you have or suspect you have a medical problem, promptly contact your professional healthcare provider. Read more about our editorial process and content philosophy here.

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