An Introduction to the Varieties and Nutritional Value of Coarse Grains

Coarse grains are a category of grains defined in contrast to refined grains such as white rice and white flour. They generally refer to grains that undergo simple processing and retain more of the outer bran and germ, and pulses and tubers are also often included in this category. Because they are processed only minimally, coarse grains tend to retain more dietary fiber, B vitamins and minerals.

In terms of varieties, coarse grains can be roughly divided into three types. The cereal group includes corn, millet, sorghum, oats, buckwheat, barley and others; the pulse group includes mung beans, red beans, peas, broad beans, kidney beans and others; and tubers such as sweet potato, potato and Chinese yam are likewise often included in the coarse grain category. Different coarse grains differ in taste and in the nutrients they emphasize, so they can be chosen flexibly according to dietary habits.

In terms of practical value, the most prominent feature of coarse grains is their high dietary fiber content, which helps promote intestinal peristalsis, and they are digested and absorbed relatively slowly, so blood sugar rises more gently after a meal. In daily life they can be combined with refined grains and used to make porridge, steamed rice or flour for staple foods, which both enriches the taste and makes nutrient intake more balanced.

It should be noted that coarse grains are not better the more you eat. Too much dietary fiber may increase the burden on the stomach and intestines, and the elderly, children and people with weak digestive function should appropriately control their intake. A safer approach is to combine coarse and refined grains and proceed gradually, letting the stomach and intestines adapt step by step, which makes it easier to keep up over the long term.