健康饮食的英语表述方式是"healthy diet"或"healthy eating". 这个短语的来源可能源于人们对饮食健康的关注和重视，以及对保持身体健康所必需的营养成分的关注。一些例句如下：

Eating a healthy diet can help you maintain a healthy weight and reduce your risk of chronic diseases.
(通过健康饮食可以帮助您保持健康的体重，并降低您患慢性疾病的风险。)

To maintain a healthy diet, it's important to eat a variety of fruits, vegetables, and whole grains.
(为了保持健康的饮食，重要的是多吃水果、蔬菜和全谷物。)

A healthy diet can also include lean proteins, healthy fats, and low-fat dairy products.
(健康的饮食也可以包括瘦蛋白质、健康的脂肪和低脂奶制品。)