Is hamburger a incomplete protein

Yes, hamburger meat is considered an incomplete protein when looked at from the perspective of plant-based proteins, as it does not contain all the essential amino acids in the proportions needed by the human body. However, animal-based proteins like those found in hamburger are generally considered complete proteins because they provide all nine essential amino acids. Therefore, while hamburger can be a good source of protein, it is more accurate to say that plant sources are typically classified as incomplete.