This article critically evaluates medical and social constructionist approaches to obesity, within the context of a multidisciplinary life course paradigm, illuminating the importance of being cognisant of the strengths and weaknesses associated with both approaches. It therefore helps social workers to engage more critically and holistically with obesity, particularly understanding the limitations of the medical model, the influence of social divisions and inequalities, cultural issues, stigmatisation and value judgements and consequentially the importance of defending human rights and upholding social justice. To read the full article, log in using your NHS OpenAthens details.