Here are a few description options for the WordPress post_tag “肌酸” in Traditional Chinese, ranging in length and focus:

**Option 1 (Concise & Informative):**

> 肌酸是一種常見的運動營養補充品，有助於提高肌肉力量、耐力，並增強運動表現。 了解肌酸的益處、用法以及潛在副作用。
>
> _Translation: Creatine is a common sports nutrition supplement that helps improve muscle strength, endurance, and enhance exercise performance. Learn about the benefits, usage, and potential side effects of creatine._

**Option 2 (More Detailed):**

> 肌酸：深入探討這種廣受歡迎的運動補給品。 探索肌酸对肌肉生長、力量增強、能量供應以及整體運動表現的影響。 阅读关于不同类型的肌酸，理想剂量，适用人群，以及潜在的安全问题，帮助您了解如何明智地使用肌酸以优化您的健身之旅。
>
> _Translation: Creatine: A deep dive into this popular sports supplement. Explore the effects of creatine on muscle growth, strength enhancement, energy supply, and overall athletic performance. Read about different types of creatine, ideal dosages, target users, and potential safety considerations to help you understand how to use creatine wisely and optimize your fitness journey._

**Option 3 (Focusing on Benefits and Considerations):**

> 肌酸補充：您需要知道的一切。 肌酸是健身愛好者和運動員的熱門選擇，可以增強肌肉力量和爆發力。 在開始補充肌酸之前，了解它的優點和風險至關重要。 本文章將探討肌酸的功效、不同類型、服用方法、潛在副作用以及適合使用肌酸的人群。
>
> _Translation: Creatine Supplementation: Everything you need to know. Creatine is a popular choice for fitness enthusiasts and athletes to enhance muscle strength and power. Understanding the benefits and risks is crucial before starting creatine supplementation. This article will explore the effects of creatine, different types, how to take it, potential side effects, and who is suitable to use it._

**Option 4 (Short & Sweet):**

> 關於肌酸的資訊，包括其作用、益處和使用方法。
>
> _Translation: Information about creatine, including its effects, benefits, and how to use it._

**Choosing the best option:**

* **Consider your audience:** Who are you trying to reach? Are they beginners or experienced fitness enthusiasts?
* **Consider your content:** What kind of posts will be tagged with “肌酸”? The description should relate to the main content of those posts.
* **WordPress’s SEO features:** You can often enter a brief description in the description box within the tag’s settings in WordPress. The longer options might be too long for that.
* **Practicality:** The shorter options are quicker to implement and good for a quick overview, while the longer descriptions can provide more detail and SEO value if your WordPress theme uses them.