The protein content in a food can be found either on its nutrition label or in a database of nutrition information such as that provided by the U.S. Department of Agriculture. Protein content is generally listed in grams per serving.
On a standard nutrition label, protein content is listed at the bottom of the main section beneath the information on fats and carbohydrates. The protein content is represented in grams per serving. A typical serving of meat, poultry or seafood is approximately 3 ounces. The nutrition label also provides the percent of recommended daily intake provided by the food. A food with less than 5 percent of the daily intake of a nutrient is considered low in that nutrient, while a food with more than 20 percent of the daily intake is considered high in that nutrient. The U.S. Department of Agriculture also provides a database containing the nutrition information for a wide variety of common foods including plain ingredients, prepared foods and commercial brands. Search for a specific food in this or another database to find the protein content as well as the complete breakdown of other nutrients. Nutrition information is also available from food manufacturers and restaurant chains and can be found on their websites or by request at their locations.