A systematic review demonstrated that Atkins, Weight Watchers (WW), and Zone diets achieved modest and similar long-term weight loss. Data are conflicting and insufficient to identify one popular diet as being more beneficial than the others. Twelve randomized controlled trials (RCTs, n=2559) with follow-up ≥12 months were identified. At 12 months, ten RCTs comparing popular diets to usual care revealed that only WW was consistently more efficacious at reducing weight. However, two head-to-head RCTs suggest that Atkins, WW, Zone, and control all achieved modest long-term weight loss. Twenty-four-month data suggest that weight lost with Atkins or WW is partially regained over time. It is unclear if these diets are effective to help people lose weight and decrease their risk factors for heart disease. Source: http://circoutcomes.ahajournals.org/一项系统综述表明，阿特金斯，体重监护（WW），以及区域饮食方案取得了适度和类似的长期减肥效果。数据相互矛盾，不足以确定某个流行饮食方案比其它的更好。锁定了十二个随机对照试验（RCT，N =2559）且随访≥12个月。在12个月时，十个RCT显示流行的饮食方案与常规处理相比较，只有WW持续减肥效果更好。但是，有两个并行的RCT表明，阿特金斯，WW，区域，和对照饮食方案均取得了适度的长期减肥效果。二十四个月的数据表明，阿特金斯或WW饮食减轻的体重随着时间的推移又部分地恢复了。目前还不清楚这些饮食方案是否能有效地帮助人们减肥，并减少罹患心脏病的风险。来源：http://circoutcomes.ahajournals.org/
