This review provides a comprehensive assessment of the impact of worksite interventions published over the past 15 years on dietary outcomes. It complements previous
reviews that examined the impact of worksite interventions on physical activity [13-15] and weight loss [9,10] outcomes. Strengths include the systematic approach to
searching the literature and inclusion of a broad range of study designs. Inclusion of study designs other than RCTs is important when evaluating complex interventions such
as worksite programmes because application of an RCT design may be difficult and/or ethically inappropriate in practice. Limitations of the review include restriction of
the search to studies published in English and use of a limited number of electronic databases. These search restriction may account for the predominance of North American studies retrieved. However this may also be due to the fact that employer health insurance contributions are common in the United States, providing a greater
incentive for US employers to implement and evaluate the effectiveness of worksite health promotion programmes. Publication bias may also mean some relevant worksite
health promotion programmes were not included. This is a particular possibility with community health promotion initiatives where many non-academic schemes are not
evaluated and/or published.