“节食减肥”常见的英文表达是 “diet for weight loss” 或 “go on a diet to lose weight”。
“diet for weight loss”：简洁直接地表达了通过控制饮食来达到减肥目的这一概念。例如：Many people try diet for weight loss, but it's important to do it in a healthy way.（很多人尝试节食减肥，但重要的是要以健康的方式进行。）
“go on a diet to lose weight”：更强调开始采取节食这一行动来实现减肥，“go on a diet” 是比较常用的表达“节食”的短语。例如：She decided to go on a diet to lose weight before her wedding.（她决定在婚礼前节食减肥。 ）