Firstly I would like to thank God for His blessmgs and love I gratefully acknowledge the people who contributed to the complet~on of thls dissertation. I would especidly hke to thank Prof Welma Oosthuizen my study leader for her dedication, support and guidance. Your exceptional knowledge and passion for the field of nutrition research inspired me. Dr Marlien Pieters my co-study leader for her assistance, continuing support and guidance. Dr Grieta Hanekom for guiding me in the menu design and preparation process. Dr Du Toit Loots for empowering me with laboratorial skills, and guidance throughout the process of fatty acid analysis. Prof L.A. Greyvenstein for language editing To all my friends for their boundless energy and support. Louwrie ...