Okay, here are a few descriptions for the WordPress post tag “B12” in Traditional Chinese, ranging in formality and specificity:

**Option 1: Concise and Direct (Suitable for most uses)**

* **Traditional Chinese:** 維生素B12 (Wéi shēngsù B12)
* **Description:** 關於維生素B12（Vitamin B12）的文章，包括其功能、來源、缺乏症狀等。 (Articles about Vitamin B12, including its functions, sources, deficiency symptoms, etc.)

**Option 2: Slightly more informative (Good for health or science blogs)**

* **Traditional Chinese:** 維生素B12 (Wéi shēngsù B12)
* **Description:** 涵蓋維生素B12相關資訊，如紅血球生成、神經系統健康，以及素食者應注意的攝取方式。 (Information related to Vitamin B12, such as the formation of red blood cells, the health of the nervous system, and the intake methods that vegetarians should pay attention to.)

**Option 3: For a Blog Targeting Specific Audience (e.g., nutrition enthusiasts)**

* **Traditional Chinese:** 維生素B12 (Wéi shēngsù B12)
* **Description:** 深入探討維生素B12在身體中的角色、食物來源，以及補充劑的選擇。 尤其關注素食者的B12管理方案，讓您了解如何維持健康。 (An in-depth exploration of the role of Vitamin B12 in the body, food sources, and the selection of supplements. Focusing especially on B12 management plans for vegetarians, to help you understand how to maintain health.)

**Key Considerations for Choosing:**

* **Audience:** Who are you writing for? A general audience needs simpler explanations. A more informed audience can handle more detail.
* **Blog Content:** How in-depth are your articles about B12? The description can reflect that.
* **SEO:** While the tag itself is the keyword, the description can help search engines understand the broader context.

Remember to choose the description that best fits your blog’s style and target audience. I recommend Option 1 if you’re unsure, as it’s a good balance between simplicity and usefulness. Good luck!