Recent ecosystem service models have placed biodiversity as a central factor in the processes which link the natural environment to health. While it is recognized that disturbed ecosystems might negatively affect human wellbeing it is not clear whether biodiversity is related to or can promote 'good' human health and wellbeing. The aim of this study was to systematically identify, summarize and synthesize research which had examined whether biodiverse environments are health promoting. The objectives were twofold: 1) to map the interdisciplinary field of enquiry and, 2) assess whether current evidence enables us to characterize the relationship. Due to the heterogeneity of available evidence a narrative synthesis approach was used, which is textual rather than statistical. Extensive searches identified 17 papers which met the inclusion criteria: 15 quantitative and two qualitative. The evidence was varied in disciplinary origin with authors Critical Reviews, 17:1, 1-20. http://dx.doi.org/10.1080/10937404.2013 2 approaching the question using different study designs and methods, and conceptualizations ofbiodiversity, health and wellbeing. There is some evidence to suggest that biodiverse natural environments promote better health through exposure to pleasant environments or the encouragement of health-promoting behaviors. There was also evidence of inverse relationships, particularly at a larger scale (global analyses). However, overall the evidence is inconclusive and fails to identify a specific role for biodiversity in the promotion of better health. High quality interdisciplinary research is needed to produce a more reliable evidence base. Of particular importance is identifying the specific ecosystem services, goods and processes through which biodiversity may generate good health and wellbeing.Post-peer review pre-publication version. Published as: Rebecca Lovell , Benedict W. Wheeler , Sahran L. Higgins , Katherine N. Irvine & Michael H. Depledge (2014) A Systematic Review of the Health and Well-Being Benefits of Biodiverse Environments, Journal of Toxicology and Environmental Health, Part B:Published at: http://dx