Soybeans have been touted as sources of "complete protein." However, the entire concept is actually a myth.
All unrefined foods have varying amounts of protein with varying amino acid profiles, including leafy green vegetables, tubers, grains, legumes, and nuts. All the essential and nonessential amino acids are present in any single one of these foods in amounts that meet or exceed your needs, even if you are an endurance athlete or body builder.
Soybean.
Proteins. If your source of protein is from animals, that's called a "complete protein", if you're getting plant protein (beans, grains) you'll need to make sure to mix it up a bit getting the proteins from a few different sources so that you can get the complete protein.
complete protiens
most plant proteins such as legumes (beans) and grains are incomplete proteins. combining certain complementary proteins can make complete proteins such as beans and rice, mac and cheese, pita bread and hummus, peanut butter sandwich, etc. =)
The combination of legumes (such as beans, lentils, and chickpeas) and grains (such as rice, wheat, and corn) is often used to provide a complete protein source. Legumes are rich in certain essential amino acids that grains lack, while grains provide amino acids that are limited in legumes. Together, they complement each other to form a complete protein profile.
Depends, but a carnivore will get most of their protein from its prey.
Whey protein, a by-product of cheese manufacture.
meat
No, most sweets such as brownies and cookies do not have protein. Try adding peanut butter for added protein.
water-packed tuna
water-packed tuna
Vegetable protein, like soy beans, or lentils.