title: A randomised trial of nutrient supplements to minimise psychological stress after a natural disaster.
abstract: After devastating flooding in southern Alberta in June 2013, we attempted to replicate a New Zealand randomised trial that showed that micronutrient (minerals, vitamins) consumption after the earthquakes of 2010-11 resulted in improved mental health. Residents of southern Alberta were invited to participate in a study on the potential benefit of nutrient supplements following a natural disaster. Fifty-six adults aged 23-66 were randomised to receive a single nutrient (vitamin D, n=17), a few-nutrients formula (B-Complex, n=21), or a broad-spectrum mineral/vitamin formula (BSMV, n=18). Self-reported changes in depression, anxiety and stress were monitored for six weeks. Although all groups showed substantial decreases on all measures, those consuming the B-Complex and the BSMV formulas showed significantly greater improvement in stress and anxiety compared with those consuming the single nutrient, with large effect sizes (Cohen's d range 0.76-1.08). There were no group differences between those consuming the B-Complex and BSMV. The use of nutrient formulas with multiple minerals and/or vitamins to minimise stress associated with natural disasters is now supported by three studies. Further research should be carried out to evaluate the potential population benefit that might accrue if such formulas were distributed as a post-disaster public health measure.
authors.affiliation: Department of Paediatrics, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Canada. Electronic address: kaplan@ucalgary.ca.
authors.forename: Bonnie J
authors.initials: BJ
authors.lastname: Kaplan
authors.affiliation: Department of Psychology, University of Canterbury, Christchurch, New Zealand.
authors.forename: Julia J
authors.initials: JJ
authors.lastname: Rucklidge
authors.affiliation: Department of Psychology, University of Canterbury, Christchurch, New Zealand.
authors.forename: Amy R
authors.initials: AR
authors.lastname: Romijn
authors.affiliation: Department of Paediatrics, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Canada.
authors.forename: Michael
authors.initials: M
authors.lastname: Dolph
mesh_terms: D000328:Adult; D000368:Aged; D000416:Alberta; D001007:Anxiety / Q000188:drug therapy; D003863:Depression / Q000188:drug therapy; D019587:Dietary Supplements; D004190:Disasters; D055866:Earthquakes; D005260:Female; D006801:Humans; D008297:Male; D008603:Mental Health; D008875:Middle Aged; D008903:Minerals / Q000627:therapeutic use*; D013315:Stress, Psychological / Q000188:drug therapy*; D014803:Vitamin B Complex / Q000627:therapeutic use; D014807:Vitamin D / Q000627:therapeutic use; D014815:Vitamins / Q000627:therapeutic use*; D055815:Young Adult
chemical_list: D008903:Minerals; D014815:Vitamins; D014803:Vitamin B Complex; D014807:Vitamin D
keywords: Dietary supplements; Disasters; Mental health; Public health