Many foods in our daily life are rich in protein and can supplement protein for our body. Common protein-rich foods include squid, soybeans and beef. Many foods are rich in protein, such as squid, soybeans, and beef jerky, etc., which can be consumed in moderation without allergies to supplement protein for the human body. Squid (dried), for example, contains a high protein content of about 60 grams / 100 grams. In addition, soybeans contain about 35% protein, beef contains about 20% protein, eggs contain about 13.3% protein, and milk contains about 3-4% protein. High-quality protein generally comes from animal products and soybeans, and all types of people, especially teenagers and children, should focus on high-quality protein intake.