Foods that start with O

USDA's reference data names 27 common foods that start with O, from o'brien potatoes to oyster stew soup; 4 of them are vegetables and vegetable products. Each is listed with its calories and protein in a typical portion.

Data: USDA FoodData Central, April 30, 2026 release.

Vegetables and Vegetable Products

O'brien potatoes157 calories, 4.6 g protein in 1 cup
Okra31 calories, 1.8 g protein in 8 pods
Onion rings219 calories, 2.7 g protein in 6 rings
Onions44 calories, 1.2 g protein in 1 medium

Baked Products

Oat bran bread71 calories, 3.1 g protein in 1 slice
Oatmeal bread76 calories, 2.4 g protein in 1 oz
Oatmeal cookies131 calories, 1.8 g protein in 1 oz

Beverages

Oat milk110 calories, 1.6 g protein in 1 cup
Orange drink122 calories, 0.0 g protein in 1 cup
Orange-flavor drink386 calories per 100 g

Finfish and Shellfish Products

Ocean perch82 calories, 15.7 g protein in 3 oz
Octopus305 calories, 17.9 g protein in 1 cup
Oyster140 calories, 9.6 g protein in 1 cup

Fruits and Fruit Juices

Olives116 calories per 100 g
Orange juice112 calories, 1.7 g protein in 1 cup
Oranges77 calories, 1.4 g protein in 1 fruit

Soups, Sauces, and Gravies

Onion soup293 calories per 100 g
Oyster sauce51 calories per 100 g
Oyster stew soup48 calories per 100 g

Cereal Grains and Pasta

Oat bran88 calories, 7.0 g protein in 1 cup

Breakfast Cereals

Oats303 calories, 10.5 g protein in 1 cup

Fats and Oils

Olive oil126 calories, 0.0 g protein in 1 tablespoon

Lamb, Veal, and Game Products

Opossum188 calories, 25.7 g protein in 3 oz

Poultry Products

Ostrich149 calories, 22.2 g protein in 1 serving

Other foods

Oatmeal34 calories, 0.7 g protein in 1 oz, cooked
Onion bread102 calories, 3.8 g protein in 1 large or thick slice
Onion dip52 calories, 0.3 g protein in 1 tablespoon

Source: USDA FoodData Central (SR Legacy, Foundation, Survey), April 30, 2026 release.

Sources for this page

USDA FoodData Central: the food and product records, April 30, 2026 release. fdc.nal.usda.gov
FoodData Central documentation: what each data type is and how branded records are submitted. fdc.nal.usda.gov
USDA Food and Nutrient Database for Dietary Studies: the survey foods and their portions. ars.usda.gov
21 CFR 101.9, Nutrition labeling of food: the label format, rounding and Daily Values. ecfr.gov
FDA, How to Understand and Use the Nutrition Facts Label: the 5% and 20% Daily Value rule. fda.gov