Final answer:
Foods from animal sources are usually complete proteins, containing all essential amino acids necessary for the body.
Step-by-step explanation:
With regard to protein content, foods from animal sources are usually complete. This means that they contain all the essential amino acids that our body requires for proper functioning. Animal-based proteins, such as meat, fish, eggs, and dairy products, are considered complete proteins. On the other hand, plant-based proteins, such as beans, legumes, and grains, are often incomplete as they lack certain essential amino acids.
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