It’s High in Calories
Cassava contains 112 calories per 3.5-ounce (100-gram) serving, which is quite high compared to other root vegetables. For example, the same serving of sweet potatoes provides 76 calories, and the same amount of beets provides only 44. This is what makes cassava such an important crop for developing countries, since it is a significant source of calories. However, its high calorie count may do more harm than good for the general population.
Consuming high-calorie foods on a regular basis is associated with weight gain and obesity, so consume cassava in moderation and in reasonable portions. An appropriate serving size is about 1/3–1/2 cup (73–113 grams).
Summary: Cassava contains a significant number of calories, so consume it in moderation and in appropriate portion sizes.