Lectin is a type of protein that is commonly found in plants and has the ability to bind to sugar molecules. Sometimes referred to as agglutinins, lectins play a role in immune response, cell communication, and digestion. However, some types of lectins can be harmful to humans and may cause digestive issues or interfere with nutrient absorption. There are many different types of plant lectins, each with unique properties and functions. Some common synonyms for lectin include agglutinin, phytohemagglutinin, hemagglutinin, and glycoprotein. Understanding the different types and functions of lectins is important in maintaining a healthy diet and avoiding potential health complications.