Guinea Corn Is High-Carb and Low-FatMost of the calories in guinea corn come from carbohydrates, making the grain a good source of energy. According to the USDA, sorghum contains about 69 grams of carbs per ½ cup serving, and 6.5 grams of fiber. Studies show that eating more fiber may also help reduce your risk of heart disease by lowering your cholesterol levels. Guinea corn is also considered a low-fat food product, with 3.3 grams of fat per ½ cup serving. About 0.59 grams of that are saturated fat, 1.09 grams monounsaturated, and 1.5 grams polyunsaturated per serving, according to the USDA.