DEAR DR. BLONZ: Is there any significant difference between the protein in red meat and that found in seafood, such as shrimp? : There are minor differences between the proteins found in red meat and seafood, and these are mainly different amounts of the various essential amino acids. Both are considered high-quality “complete” proteins, in that they both contain good amounts of all the amino acids the body needs to make its protein. Scientists score proteins by looking at the types of amino acids they contain and then comparing them with the amino acids in our body's protein. The key is to have a mix of high-quality protein foods and other protein-containing foods, including grains, legumes, vegetables, nuts and seeds.