Bioactive Peptides Derived from Different Sources

Bioactive peptides are defined as fractions of proteins, which have a specific sequence that has a positive physiological effect and may influence health (Kitts and Weiler 2003). The structure of bioactive peptides consists of amino acids linked together by covalent (or also known as peptide) bonds, and an overall lower molecular weight compared to proteins. Proteins are building blocks of life which play a critical role in the metabolic functions of the human body. Bioactive peptides derived from proteins may thus impact human health by displaying multifunctional activities and can be classified as antioxidative, antimicrobial, antihypertensive, opioid, immunomodulatory, and anti-thrombotic (Sanchez and Vazquez 2017).