> For the complete documentation index, see [llms.txt](https://kennys-personal-organization-1.gitbook.io/humansystemoptimization/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kennys-personal-organization-1.gitbook.io/humansystemoptimization/he-xin-zhang-jie/chapter-2-diet.md).

# 第二章：饮食与 Fasting

这一章聚焦一个核心观点：**何时吃，与吃什么同等重要**。

* [2.1 Fasting 的科学背景](/humansystemoptimization/he-xin-zhang-jie/chapter-2-diet/fasting-background.md)
* [2.2 Fasting 实践指南](/humansystemoptimization/he-xin-zhang-jie/chapter-2-diet/fasting-practice.md)
* [2.3 饮食与肠道健康](/humansystemoptimization/he-xin-zhang-jie/chapter-2-diet/gut-health.md)