This literature review synthesizes existing research on healthy ageing, obesity, and weight loss, focusing on the challenges and interventions relevant to older adults. It examines the causes and impact of obesity, highlighting the role of lifestyle interventions and calorie restrictions in promoting weight loss and improving health outcomes. The review analyzes several studies, including those that discuss the relationship between ageing, obesity, and metabolic changes, as well as the importance of exercise and dietary modifications. It explores the use of systematic review methods, the strengths and limitations of various research approaches, and the impact of socioeconomic factors on obesity. The conclusion emphasizes the importance of combining regular exercise with calorie restrictions to mitigate obesity-related issues and improve the quality of life for older adults. The review underscores the need for future research to address lean body mass and bone loss in older adults, while also providing practical recommendations for clinicians and individuals seeking to manage weight and promote healthy ageing.