SUMMARY
Corn is mainly composed of carbs and fairly high in fiber. It also packs a decent amount of low-quality protein.

Corn oil
The fat content of corn ranges from 5–6%, making it a low-fat food .

However, corn germ, an abundant side-product of corn milling, is rich in fat and used to make corn oil, which is a common cooking product.

SUMMARY
Whole corn is relatively low in fat, though corn oil — a highly refined cooking oil — is sometimes processed from corn germ, a side product of corn milling.

Vitamins and minerals
Corn may contain a fair amount of several vitamins and minerals. Notably, the amount is highly variable depending on the corn type.

Potassium. An essential nutrient, potassium is important for blood pressure control and may improve heart health.

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

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.