PLOS MED:含糖饮料税能为年轻人减轻“甜蜜的负担”吗?

2021-05-29 MedSci原创 MedSci原创

征收饮料税能使年轻人含糖饮料的摄入量大幅减少。

大量研究已经证实,过量的添加糖,特别是含糖饮料的添加糖,是血管疾病和2型糖尿病等心血管代谢疾病的主要危险因素。

JAMA子刊曾报道,那些饮用含糖量最高的饮料(包括100%纯果汁)的人在研究期间死亡率要高于那些饮用含糖量最低的人。此外,每多摄入12盎司/日的含糖饮料,全因死亡风险会增加11%;而每多摄入12盎司/日的果汁,全因死亡风险就会增加24%。

2016年,世界卫生组织(WHO)就曾呼吁各界重视税收等政策运用,以提高含糖饮料售卖,从而帮助消费者改变饮食选择。虽然含糖税的本质立意很好,但是反对的声音一直不绝于耳。例如,自英国开始收含糖税后,Nielsen公司民调显示,63%的民众表示糖税并没有影响他们的消费行为。甚至原本11%的民众曾表示在实施税法后会停止购买含糖饮料,而实际则将至1%。

为了预防和降低肥胖症和糖尿病患者的患病率,南非在2018年4月实施了一项基于糖含量的税收,称为健康促进税,这是第一批基于含糖饮料(SSB)税收之一。这为了估计SSB量在征税1年后的变化,来自北卡罗来纳大学全球公共卫生学院营养系的专家开展了相关研究。结果发表在《公共科学图书馆》子刊PLOS Medicine杂志上。

研究人员在南非对18-39岁的成年人进行重复横断面调查,收集了单日24小时饮食回顾。2018年2-3月(税前,n = 2459)和2019年2-3月(税后,n = 2489)采用上门抽样的方式招募了参与者。研究人员还开发了税前和税后南非饮料的特定时间食物成分表(FCTs),并与饮食回顾联系起来。

接下来,使用税后时期的最新FCT来重复分析,以捕捉重新配方的边际效应。使用两部分模型来估计饮料摄入量,考虑到使用普通最小二乘法或其他连续变量方法时的偏差,许多人的摄入量为零。

每日从已征税、未征税和全部饮料中摄入的糖的克数

在被征税的饮料中,糖的摄入量从征税前的28.8(95% CI 27.3-30.4)显著减少到征税后的19.8克/人/天(95% CI 18.5-21.1)。能量摄入从税前的121(95% CI 114-127)减少到税后的82千卡/人/天(95% CI 76-87)。摄入量从税前的315(95% CI 297-332)减少到税后的198 ml/人/天(95% CI 185-211)。

每日从已征税、未征税和总饮料中摄入的能量(千卡)

在未征税的饮料中,糖的摄入量增加了5.3克/人/天,能量摄入增加了29千卡/人/天。在所有饮料中,糖的摄入量明显减少3.7克/人/天。行为改变使能量摄入减少了24%,糖减少了22%,体积减少了23%,而重新配制使被征税饮料的能量减少了8%,糖减少了9%,体积减少了14%。

综上,征收饮料税能使年轻人含糖饮料的摄入量大幅减少。

 

参考文献:

Taxed and untaxed beverage intake by South African young adults after a national sugar-sweetened beverage tax: A before-and-after study. https://doi.org/10.1371/journal.pmed.1003574

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