Is Cassava Healthy for People With Diabetes?

Is Cassava Good for People With Diabetes?

Is Cassava Good for People With Diabetes?
Everyday Health

Cassava, also known as yuca or manioc, is a root vegetable that has lately become trendy in the United States as a health ingredient and gluten-free starch.

It contains relatively little protein and fiber, especially when processed into flour. It may be less healthy for people with diabetes than heartier whole grains.

This ingredient is widely cultivated in tropical and subtropical areas of Africa, Asia, and South America. In the West, it is perhaps best known as the source for tapioca, a starch that can be prepared as a pudding or shaped into the tapioca pearls (boba) that are added to bubble tea.

The starchy roots of this plant are used to make many other foods, too, such as gluten-free flatbreads and pancakes.

Cassava is poisonous if eaten raw, but preparing it properly destroys its toxic compounds.

Cassava Nutrition

The edible part of the cassava plant is a starchy tuber. It has similar nutritional properties to other root crops, such as potatoes, taro, and yams.

Cassava flour, ground cassava root that has been prepared to remove the toxic compounds, is almost pure carbohydrates: 100 grams of flour contains less than 1 gram each of fat and protein.

It does contain 7 grams of fiber, a healthy component of a diabetes-friendly diet, though this amount is lower than that found in many other gluten-free cereals and legumes. It also contains relatively few vitamins and minerals.

Tapioca Nutrition

Tapioca flour is extracted from pressed cassava roots. It has even less nutritional value than cassava flour.

Some tapioca flour products contain zero fiber, zero protein, and very few vitamins or minerals.

Though tapioca flour doesn’t necessarily include any added sugar, prepared and packaged tapioca products, like tapioca pudding mix, might. Be sure to check the nutrition facts of tapioca products for added sugar.

Tapioca pearls also typically do not contain any added sugar, though they are very frequently a component of very sweet dishes, such as bubble tea.

The high carbohydrate content of these products suggests they are likely to increase blood sugar levels. The high level of processing and relative lack of protein, fiber, and nutrients mean that cassava products may be less healthy for people with diabetes.

Otherwise, there is little or no direct evidence that cassava or tapioca products are especially beneficial or harmful for people with diabetes.

Cassava Toxicity

Cassava naturally contains an acid that releases cyanide, a poisonous and potentially fatal substance, when digested. Preparing cassava, typically by peeling, soaking, and cooking, deactivates this ingredient, rendering it safe for human consumption.

Cyanide poisoning is a more significant issue in parts of the world such as Africa, where cassava can make up a very high percentage of the diet, food safety regulation is looser, and farmers often cultivate bitter varieties that contain higher levels of toxins.

Sweeter cassava, which is used for the tapioca flours, puddings, and pearls you can easily find in grocery stores across the United States, is less toxic. However, food manufacturers must still prepare it properly to remove any risk.

It is possible to buy fresh, raw cassava roots and frozen, peeled raw cassava. Home cooks should be careful when handling this ingredient, though it’s easy to prepare it safely. Peeling the root’s inedible outer layer removes most of the toxins. Cooking further reduces concentrations to safe levels.

Symptoms of cyanide poisoning include gastrointestinal distress, dizziness, rapid breathing, and excitement or restlessness.

 There is no evidence of cyanide poisoning outbreaks from cassava consumption in the United States.

The Takeaway

  • Cassava is a root vegetable that’s widely consumed in tropical parts of the world. It is the source of tapioca.
  • This ingredient, especially when refined into tapioca flour, is almost pure carbohydrates and lacks substantial amounts of protein, fats, and minerals.
  • Cassava is poisonous when eaten raw. It should be handled with care when prepared at home.
  • Because cassava and tapioca products contain less nutritional value than other whole-grain starches and legumes, it may be best to enjoy them in moderation.
EDITORIAL SOURCES
Everyday Health follows strict sourcing guidelines to ensure the accuracy of its content, outlined in our editorial policy. We use only trustworthy sources, including peer-reviewed studies, board-certified medical experts, patients with lived experience, and information from top institutions.
Resources
  1. Cassava Plant Guide. U.S. Department of Agriculture. February 5, 2024.
  2. Flour, Cassava. U.S. Department of Agriculture FoodData Central. April 20, 2023.
  3. Mohidin SRNSP et al. Cassava (Manihot esculenta Crantz): A Systematic Review for the Pharmacological Activities, Traditional Uses, Nutritional Values, and Phytochemistry. Journal of Evidence-Based Integrative Medicine. October 11, 2023.
  4. Finely Ground Tapioca Flour. U.S. Department of Agriculture FoodData Central. November 16, 2023.
  5. Small Pearl Tapioca. U.S. Department of Agriculture FoodData Central. September 14, 2023.
  6. Types of Carbohydrates. American Diabetes Association.
  7. Outbreak of Cyanide Poisoning Caused by Consumption of Cassava Flour — Kasese District, Uganda, September 2017. Centers for Disease Control and Prevention. April 5, 2019.
  8. Omoniyi SA et al. Cooking Practice and Safety Assessment of Boiled Cassava Root Sold in Streets of Gashua, Yobe State Nigeria. Food Chemistry Advances. June 2024.
  9. Cyanide. Centers for Disease Control and Prevention. September 6, 2024.
kayli-anderson-bio

Kayli Anderson, RDN

Medical Reviewer

Kayli Anderson has over a decade of experience in nutrition, culinary education, and lifestyle medicine. She believes that eating well should be simple, pleasurable, and sustainable. Anderson has worked with clients from all walks of life, but she currently specializes in nutrition therapy and lifestyle medicine for women. She’s the founder of PlantBasedMavens.com, a hub for women to get evidence-based, practical, and woman-centered guidance on nutrition and cooking, hormone health, fertility, pregnancy, movement, mental well-being, nontoxic living, and more.

Anderson is board-certified in lifestyle medicine and serves as lead faculty of the American College of Lifestyle Medicine’s (ACLM) "Food as Medicine" course. She is past chair of the ACLM's registered dietitian member interest group, secretary of the women's health member interest group, and nutrition faculty for many of ACLM's other course offerings. She is the coauthor of the Plant-Based Nutrition Quick Start Guide and works with many of the leading organizations in nutrition and lifestyle medicine to develop nutrition content, recipes, and educational programs.

Anderson frequently speaks on the topics of women’s health and plant-based nutrition and has coauthored two lifestyle medicine textbooks, including the first one on women’s health, Improving Women's Health Across the Lifespan.

She received a master's degree in nutrition and physical performance and is certified as an exercise physiologist and intuitive eating counselor. She's a student of herbal medicine and women's integrative and functional medicine. She lives with her husband in the Colorado Rocky Mountains, where you’ll find her out on a trail or in her garden.

Joshua Beidler

Author

Joshua Beidler has been writing about health and nutrition since 2008. In addition to being the author of two books, he has written for "Vision Magazine" and other publications. Beidler holds a certificate in clinical nutrition, as well as a Bachelor of Arts in English from the University of San Diego.