Sweet potatoes are a common carbohydrate source, also providing fiber, vitamins, and minerals. Compared to many refined starchy foods, sweet potatoes contain more fiber, which slows down the digestion and absorption of carbohydrates.

For people with prediabetes, diabetes, or those looking to maintain stable energy levels, choosing, preparing, and consuming sweet potatoes in appropriate amounts can help manage blood sugar and metabolic health.

Blood sugar may rise more slowly

Fiber and some resistant starch in sweet potatoes can slow down digestion, thereby limiting the rate at which glucose enters the bloodstream after meals. Therefore, substituting sweet potatoes for some refined carbohydrate sources can result in meals with a slower carbohydrate release rate.

However, sweet potatoes still contain starch and can raise blood sugar. The extent of the increase depends on the sweet potato variety, ripeness, portion size, and preparation method.

Sweet potatoes provide fiber, promoting satiety. Illustration: Bui Thuy.

Fiber promotes longer satiety

A medium-sized sweet potato provides a significant amount of fiber. Fiber slows digestion, contributing to feelings of fullness and helping manage food intake throughout the day. When sweet potatoes replace white bread, pastries, or other refined starches, they can help manage blood sugar.

Provides beta-carotene and vitamins

Sweet potatoes, especially those with orange flesh, are rich in beta-carotene, a precursor to vitamin A. Additionally, this food provides vitamin C, vitamin B6, potassium, and manganese, making the diet more diverse.

Important considerations

Preparation methods and portion sizes can influence post-meal blood sugar levels. Boiled or steamed sweet potatoes are generally suitable for managing carbohydrate intake, whereas baking at high temperatures or cooking until very soft can alter the glycemic index.

Compared to refined carbohydrate sources like white rice or processed bread, sweet potatoes can provide more stable energy and higher nutritional value, making them suitable for regular consumption. Sweet potatoes can be eaten with protein sources such as eggs, fish, lean meat, and non-starchy vegetables. This combination creates a more balanced meal than consuming a large amount of sweet potatoes alone.

Healthy individuals can incorporate sweet potatoes into their diet as a rich source of fiber and nutrients. People with diabetes should factor sweet potatoes into their total meal carbohydrate count, control portion sizes, and monitor blood sugar as advised by their doctor.

Bao Bao (Compiled)