You've got to ask yourself, ? "What's worth having for its own sake?

你们必须问自己，“什么是因其自身品质而值得拥有？

耶鲁公开课 - 死亡课程节选

A nutrient is considered a substance within the food, that's when it digests it, absorbs, promotes some bodily function, so that it has some metabolic health value when people consume it.

营养素是包含在食物中的物质,由人体消化,吸收,推动身体机能,食品必须具有值得人类去代谢的健康价值

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选