This document provides information about grapefruit/pomelo, including its composition, health benefits, and extraction methods. Grapefruit contains nutrients like vitamin C and flavonoids. It has potential health benefits such as reducing risk of heart disease and cancer. Grapefruit extracts can be used in food industries as antimicrobial agents to improve food safety and shelf life. Various extraction methods are discussed, including cold-pressing, GC-MS, and HPLC, to extract compounds from grapefruit peel, pulp, and seeds. Factors like pH, time, and temperature affect the extraction process.