Adrenal fatigue isn't an accepted medical diagnosis. It is a lay term applied to a collection of nonspecific symptoms, such as body aches, fatigue, nervousness, sleep disturbances and digestive problems.
Your adrenal glands produce a variety of hormones that are essential to life. The medical term "adrenal insufficiency" refers to inadequate production of one or more of these hormones as a result of an underlying disease or surgery.
显然：Adrenal fatigue ～Adrenal insufficiency～inadequate production of one or more of these hormones ～variety of symptoms (疲劳, 身体酸痛, 体重减轻, 低血压, 头昏眼花, 脱发, 皮肤变色（色素沉着）, …… ).
人家说的很清楚，Adrenal fatigue 是肾上腺激素（一种或多种）分泌不足引发的一系列症状。
可以对比一下，虽然都有一个“肾”字，症状有部分重叠，但 Adrenal Insufficiency 与中医的肾虚不是一个概念。除此之外，请注意概念定义的清晰程度。
Kai2002: 中医的肾包括生殖系统，骨骼骨髓关节脊髓大脑耳朵，虚就是这些地方能量消耗过多，功能受影响。人的肾都是最先衰的，然后人就老了。
