Tracy Li received her bachelor degree in Nutritional Science at the University of California Davis; and she graduated from California State University, Los Angeles with a Masters degree in Nutritional Science. She is also a registered dietitian in the USA. Since 2005 Ms Li has worked at NG Nutrition Consulting in California, USA. Since 2010 she has worked at Watsons with experience in nutrition consultation. Since 2012 she worked at Salome Concepts Limited as senior registered dietitian with experience in preparing nutrition information labels. Since 2014, Ms Li worked at Home Convenience Service Company Limited as Business Development Manager with experience in developing a department of nutrition and skin care products. She was a lecturer at HKU Space since 2016 with experience in conducting nutrition classes. During her professional career, Tracy has earned an extensive experience in nutrigenetics. In particular she has worked in personal consultation and customisation of dietary /nutritional plans based on DNA reports assessments of individuals.