Tony Blakely1, Christine Cleghorn2, Anja Mizdrak2, Wilma Waterlander3, Nhung Nghiem2, Boyd Swinburn4, Nick Wilson2, Cliona Ni Mhurchu4. 1. Population Interventions Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, VIC, Australia. Electronic address: ablakely@unimelb.edu.au. 2. Burden of Disease Epidemiology, Equity and Cost-Effectiveness Programme, University of Otago, Wellington, New Zealand. 3. Department of Public Health, Amsterdam University Medical Center, Amsterdam, Netherlands. 4. School of Population Health, University of Auckland, Auckland, New Zealand.
Abstract
BACKGROUND: One possible policy response to the burden of diet-related disease is food taxes and subsidies, but the net health gains of these approaches are uncertain because of substitution effects between foods. We estimated the health and cost impacts of various food taxes and subsidies in one high-income country, New Zealand. METHODS: In this modelling study, we compared the effects in New Zealand of a 20% fruit and vegetable subsidy, of saturated fat, sugar and salt taxes (each set at a level that increased the total food price by the same magnitude of decrease from the fruit and vegetable subsidy), and of an 8% so-called junk food tax (on non-essential, energy-dense food). We modelled the effect of price changes on food purchases, the consequent changes in fruit and vegetable and sugar-sweetened beverage purchasing, nutrient risk factors, and body-mass index, and how these changes affect health status and health expenditure. The pre-intervention intake for 340 food groups was taken from the New Zealand National Nutrition Survey and the post-intervention intake was estimated using price and expenditure elasticities. The resultant changes in dietary risk factors were then propagated through a proportional multistate lifetable (with 17 diet-related diseases) to estimate the changes in health-adjusted life years (HALYs) and health system expenditure over the 2011 New Zealand population's remaining lifespan. FINDINGS: Health gains (expressed in HALYs per 1000 people) ranged from 127 (95% uncertainty interval 96-167; undiscounted) for the 8% junk food tax and 212 (102-297) for the fruit and vegetable subsidy, up to 361 (275-474) for the saturated fat tax, 375 (272-508) for the salt tax, and 581 (429-792) for the sugar tax. Health expenditure savings across the remaining lifespan per capita (at a 3% discount rate) ranged from US$492 (334-694) for the junk food tax to $2164 (1472-3122) for the sugar tax. INTERPRETATION: The large magnitude of the health gains and cost savings of these modelled taxes and subsidies suggests that their use warrants serious policy consideration. FUNDING: Health Research Council of New Zealand.
BACKGROUND: One possible policy response to the burden of diet-related disease is food taxes and subsidies, but the net health gains of these approaches are uncertain because of substitution effects between foods. We estimated the health and cost impacts of various food taxes and subsidies in one high-income country, New Zealand. METHODS: In this modelling study, we compared the effects in New Zealand of a 20% fruit and vegetable subsidy, of saturated fat, sugar and salt taxes (each set at a level that increased the total food price by the same magnitude of decrease from the fruit and vegetable subsidy), and of an 8% so-called junk food tax (on non-essential, energy-dense food). We modelled the effect of price changes on food purchases, the consequent changes in fruit and vegetable and sugar-sweetened beverage purchasing, nutrient risk factors, and body-mass index, and how these changes affect health status and health expenditure. The pre-intervention intake for 340 food groups was taken from the New Zealand National Nutrition Survey and the post-intervention intake was estimated using price and expenditure elasticities. The resultant changes in dietary risk factors were then propagated through a proportional multistate lifetable (with 17 diet-related diseases) to estimate the changes in health-adjusted life years (HALYs) and health system expenditure over the 2011 New Zealand population's remaining lifespan. FINDINGS: Health gains (expressed in HALYs per 1000 people) ranged from 127 (95% uncertainty interval 96-167; undiscounted) for the 8% junk food tax and 212 (102-297) for the fruit and vegetable subsidy, up to 361 (275-474) for the saturated fat tax, 375 (272-508) for the salt tax, and 581 (429-792) for the sugar tax. Health expenditure savings across the remaining lifespan per capita (at a 3% discount rate) ranged from US$492 (334-694) for the junk food tax to $2164 (1472-3122) for the sugar tax. INTERPRETATION: The large magnitude of the health gains and cost savings of these modelled taxes and subsidies suggests that their use warrants serious policy consideration. FUNDING: Health Research Council of New Zealand.
Authors: Christine Cleghorn; Ingrid Mulder; Alex Macmillan; Anja Mizdrak; Jonathan Drew; Nhung Nghiem; Tony Blakely; Cliona Ni Mhurchu Journal: Int J Environ Res Public Health Date: 2022-04-07 Impact factor: 4.614
Authors: Connor M Sheehan; Esther E Gotlieb; Stephanie L Ayers; Daoqin Tong; Sabrina Oesterle; Sonia Vega-López; Wendy Wolfersteig; Dulce María Ruelas; Gabriel Q Shaibi Journal: Int J Environ Res Public Health Date: 2022-06-28 Impact factor: 4.614
Authors: Whitney L Do; Kai M Bullard; Aryeh D Stein; Mohammed K Ali; K M Venkat Narayan; Karen R Siegel Journal: Nutrients Date: 2020-10-23 Impact factor: 5.717
Authors: Deborah Salvo; Pablo Lemoine; Kathryn M Janda; Nalini Ranjit; Aida Nielsen; Alexandra van den Berg Journal: Nutrients Date: 2022-02-03 Impact factor: 5.717