As society ages and life expectancy increases due to medical POTTED PLANTS/FLORAL advances, younger people are becoming more interested in improving and maintaining their health.The purpose of this study is to clarify how the highly health-conscious Millennial generation perceive health consciousness, health-related behavior, and consumption behavior regarding old age and to explore factors that influence health-related behavior.Using a grounded theory approach, we conducted in-depth interviews with chronically ill millennials to derive a model of health consciousness, health-related behavior, and consumption behavior.The results allowed for a unique Pants analysis of long-term health consciousness, health-related behavior, and risk perception of consumption behavior.The findings provide academic suggestions for future studies of health-related and consumption behavior of young people, and may also contribute to directing the practical activities of government agencies and industrial enterprises.