Meat and milk and protein
animals all animals (meats) have protein, some plants have protein too, like peanuts.
The common protein found in all animals is collagen.
Yes, all animals carry protein in their bodies.
All animals need protein because their bodies use the protein to produce energy. Without protein, animals would not be able to create the cellular reactions that sustain life.
All animals need protein, and amino acids are the building blocks of protein.
comparing the weight gained in lab animals consuming a test protein with the weight in lab animals consuming a standardized (reference) protein
Animals source their protein from various sources in their diets, including plants, other animals, and sometimes from insects or microorganisms.
No. Meat comes from animals, peanuts are vegetable.
Pretty much all animals, but particularly mammals. There are different types of proteins, though, so you have to be more specific if you're after specific ones.
No
Cologyn is another way of spelling collagen, which is the protein that makes up the connective tissue in animals. It makes up about 25% of all of the protein that an animal contains.
Except for the protein that is used by the animal, protein can be lost in several ways. For example, if the animal has a problem with digestion or absorption, protein can be lost via the faeces. Protein can also be lost into the abdomen, and animals with kidney malfunction can lose protein via urine (eg. a protein losing nephropathy).