Here are a few options for the WordPress post tag description, ranging in detail and tone, all in Traditional Chinese, of course! Choose the one that best fits your website’s style and purpose:

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

> 了解維持健康所需的關鍵營養素。

**(Translation: Learn about the key nutrients needed to maintain health.)**

**Option 2 (Slightly More Detailed):**

> 深入探討人體必需的維生素、礦物質、脂肪、蛋白質和碳水化合物，幫助你更了解飲食中的重要組成。

**(Translation: Explore the essential vitamins, minerals, fats, proteins, and carbohydrates for the human body, helping you better understand the important components of your diet.)**

**Option 3 (Focus on Benefits):**

> 掌握「必需營養素」的知識，為你的健康奠定堅實的基礎。發現如何透過均衡飲食和正確的營養補充，提升身體機能，活力滿滿！

**(Translation: Master the knowledge of “Essential Nutrients” to build a solid foundation for your health. Discover how to improve bodily functions and feel full of vitality through a balanced diet and proper nutritional supplements!)**

**Option 4 (Educational & Keyword-Rich):**

> 關於「必需營養素」的全面指南。包括維生素、礦物質、脂肪酸、必需氨基酸、蛋白質、碳水化合物等。深入研究這些關鍵營養素的功能、重要性，以及如何在日常飲食中獲取。

**(Translation: A comprehensive guide to “Essential Nutrients.” Includes vitamins, minerals, fatty acids, essential amino acids, proteins, carbohydrates, etc. In-depth study of the functions, importance of these key nutrients, and how to obtain them in your daily diet.)**

**Recommendation:**

I would probably recommend **Option 2 or 3**, depending on the overall tone of your blog/website. Option 2 is well-balanced and informative, while Option 3 is more motivational and benefit-driven. Option 4 is good if you want to emphasize the educational detail. Choose the description that best reflects your content and target audience! Remember to keep it relatively concise for readability.