Here are the nutrition facts for 3.5 ounces (100 grams) of boiled yellow corn (1Trusted Source):

• Calories: 96
• Water: 73%
• Protein: 3.4 grams
• Carbs: 21 grams
• Sugar: 4.5 grams
• Fiber: 2.4 grams
• Fat: 1.5 grams

Carbs

Like all cereal grains, corn is primarily composed of carbs.

Starch is its main carb, comprising 28–80% of its dry weight. Corn also provides small amounts of sugar (1–3%) (1Trusted Source, 2).

Sweet corn, or sugar corn, is a special, low-starch variety with higher sugar content, at 18% of the dry weight. Most of the sugar is sucrose (1Trusted Source).

Despite the sugar in sweet corn, it is not a high-glycemic food, ranking low or medium on the glycemic index (GI) (3).

The GI is a measure of how quickly carbs are digested. Foods that rank high on this index may cause an unhealthy spike in blood sugar.