What Are Trace Elements? Guide to the Top 5 Essential Elements & Selenium Nutrition | Enshi Vine Tea

Understand the role of trace elements and selenium nutrition. Learn what trace elements are, the functions of five essential elements, and the risks of selenium deficiency and excess. Discover Enshi vine tea, natural flavonoids, and scientific selenium supplementation while mastering the principles of moderation and balance.

10/13/20269 min read

Daily Trace Element Sources: How Do Food, Supplements, and Vine Tea Differ?

Enshi Vine Tea | Understanding "Selenium" and Daily Nutrition through Trace Elements

In our daily nutrition, we are familiar with proteins, carbohydrates, and various vitamins. However, we often overlook another group of important nutrients that, although required in small amounts, are essential for normal bodily functions: Trace Elements.

Trace elements like iron, zinc, copper, iodine, and selenium each participate in different physiological processes. Among them, selenium (Se) is especially worth knowing. Selenium is an essential trace element and a key part of various selenoproteins. It plays a role in normal physiological functions such as antioxidant defense and thyroid hormone metabolism (Rayman, 2012; Bai et al., 2025). However, with selenium, "more is not always better." That is why we emphasize two principles: Moderation and Balance. This is also the starting point of TeaVita's concept of "Scientific Selenium Supplementation."

What Are Essential Trace Elements?

Trace elements are minerals that the human body needs—and contains—in relatively low amounts, but which are vital for normal physiological functions.

They may participate in various processes, such as enzyme activity, oxygen transport, thyroid hormone synthesis and metabolism, immune function, and the antioxidant system. Although the required amount is small, adequate intake is still a crucial part of balanced nutrition.

Common Important Trace Elements Include:

• Selenium (Se): Forms various selenoproteins, including glutathione peroxidases (GPx). It is involved in antioxidant defense and thyroid hormone metabolism (Rayman, 2012).

• Zinc (Zn): Participates in many enzyme reactions and is related to normal immune function, DNA synthesis, cell growth, taste, and smell.

• Iron (Fe): An important component of hemoglobin, involved in transporting oxygen throughout the body.

• Copper (Cu): Involved in physiological processes like iron metabolism, energy metabolism, and connective tissue formation.

• Iodine (I): An indispensable nutrient for producing thyroid hormones, closely related to normal metabolism, growth, and development.

Among these, selenium is unique because both its "deficiency" and "excess" require careful attention.

Why Is Selenium Worth Knowing?

Selenium mainly exerts its physiological effects in the body through selenoproteins. It is known that various selenoproteins are involved in redox balance, thyroid hormone metabolism, and other cellular functions (Rayman, 2012; Bai et al., 2025).

01 | Participates in Antioxidant Defense

Selenium is an important component of some glutathione peroxidases (GPxs). These enzymes are part of the body's endogenous antioxidant system, helping process peroxides and maintain cellular redox balance. In other words, selenium is not just a magical substance that "scavenges free radicals" on its own; rather, through selenoproteins, it becomes a key part of the body's own antioxidant defense system (Rayman, 2012; Bai et al., 2025).

02 | Supports Normal Immune Function

Proper selenium nutritional status is linked to normal immune function. Research continues to explore the role of selenoproteins in immune responses, oxidative stress, and inflammation regulation. However, this does not mean that the more selenium you consume, the stronger your immune system will become. Current literature reminds us that the benefits of supplementation largely depend on an individual's baseline selenium levels (Rayman, 2012; Wang et al., 2023).

03 | Related to Normal Cardiovascular Function

Selenoproteins are involved in several physiological processes related to cardiovascular function, such as oxidative stress regulation, thyroid hormone metabolism, and calcium ion regulation. Historically, severe selenium deficiency was closely associated with Keshan disease in some parts of China (Shimada et al., 2021). However, this does not mean that taking large extra doses of selenium can prevent cardiovascular disease in generally healthy people. A more accurate understanding is that maintaining adequate selenium status is part of overall balanced nutrition.

04 | Participates in Normal Thyroid Hormone Metabolism

The thyroid is one of the organs with the highest selenium concentration in the human body. Some selenoproteins act as antioxidants, while iodothyronine deiodinases are involved in the metabolism and activation of thyroid hormones. Therefore, adequate selenium status is vital for maintaining normal thyroid physiology (Ventura et al., 2017).

Selenium Deficiency and Excess: Balance is What Truly Matters

The most important thing to understand about selenium nutrition is that there is no simple "more is healthier" rule.

Selenium intake varies greatly across different regions globally, mainly influenced by soil selenium content, food sources, and dietary habits. China itself has both low-selenium and high-selenium areas (Rayman, 2012).

When selenium status is deficient, the normal function of some selenoproteinsmay be affected. Severe deficiency is associated with specific conditions like Keshan disease. Research is also exploring the links between low selenium status and immune, cardiovascular, and other health outcomes (Sun et al., 2023; Shimada et al., 2021). On the other hand, taking too much selenium also carries risks.

Therefore, TeaVita's approach to scientific selenium supplementation is not about pursuing the highest intake. It is about understanding your dietary needs, focusing on moderate intake based on a balanced diet, and avoiding blind, high-dose supplementation.

Another Botanical Feature of Vine Tea: Natural Flavonoids

When learning about Enshi vine tea, we shouldn't just look at "selenium." One of the most representative phytochemical features of Ampelopsis grossedentata is its rich content of flavonoids, with dihydromyricetin (DHM) being one of the most widely studied main components (Zhang et al., 2021; Wu et al., 2023). Current cellular, animal, and some human studies are exploring the potential biological activities of vine tea, vine tea extract, and DHM in areas like antioxidants, glucose and lipid metabolism, and inflammatory responses.

Enshi Selenium-Rich Vine Tea × DHM: A Combination Worth Exploring

A 2026 study published in the Chinese Journal of Analytical Chemistryspecifically compared the hot water extracts of selenium-enriched Ampelopsis grossedentata with regular samples. The study found that selenium-biofortified extracts had higher levels of total selenium, dihydromyricetin (DHM), and myricetin, performing better in various in vitro antioxidant tests. Total selenium levels also showed a strong correlation with the antioxidant test results (Zhou et al., 2026).

Frequently Asked Questions (FAQ)

Q1: Who specifically needs trace element supplementation?

A: Adults seeking better health can benefit. The following groups should pay special attention:

• Those with unbalanced diets: People who frequently eat out, are picky eaters, or have a limited diet.

• Middle-aged and elderly people: The body's efficiency in absorbing and utilizing nutrients may decline with age.

• Those with weaker immunity: People hoping to boost body resistance naturally.

• High-stress workers: Long-term stress consumes more antioxidant nutrients.

• Women preparing for pregnancy or during pregnancy: Under a doctor's guidance, moderate supplementation is crucial for maternal and fetal health.

Q2: Is it safe to drink Enshi vine tea every day? Will I consume too much?

A: It is absolutely safe. Enshi vine tea is a natural drink designed for daily consumption. Its organic selenium is gentle, and the daily intake is meant to fill dietary gaps and help you reach recommended levels. It is far below the tolerable upper intake level, so there is no need to worry about the risk of excess.

Q3: How long does it take to see the benefits of trace element supplementation from drinking Enshi vine tea?

A: Enshi vine tea is a natural health drink, not a quick-acting medicine. Its benefits lie in long-term conditioning. Results depend on individual health status and levels of deficiency. We recommend drinking it consistently as a healthy habit. Usually, after a few weeks to months, many people feel improved energy and stronger immunity.

Q4: What does Enshi vine tea taste like?

A: Enshi vine tea has a unique flavor. It is not a traditional tea (from the tea plant), so it contains no caffeine and lacks the bitterness of regular green tea. The tea liquor is clear, tastes sweet and mellow, and has a unique, smooth, and warm lingering sweetness, making it perfect for daily drinking.

Q5: I am taking other health supplements or medications; can I drink vine tea at the same time?

A: Enshi vine tea is a natural food and is compatible with most foods or supplements. However, if you are undergoing medical treatment, taking prescription drugs, or have health concerns, we recommend consulting a doctor or medical professional before starting any new dietary supplement plan to ensure safety.

From the Enshi Wilderness to Your Daily Cup

The importance of trace elements lies not in their "quantity," but in having just the right amount. The same goes for selenium. Through Enshi vine tea, we hope more people will start with a daily cup of tea to learn about selenium and vine tea, and to rediscover the relationship between natural plants and modern nutritional science. We neither exaggerate a cup of tea nor underestimate a leaf.

Sourced from the Enshi wilderness, understanding nature through science.

Selenium-Rich · Scientific Supplementation · Better Life.

Disclaimer: This article is for general nutritional and tea-drinking educational purposes only and does not constitute medical advice, diagnosis, or treatment. If you have an illness, special nutritional needs, or are taking medication, please consult a qualified healthcare professional.

References

Bai, S., Zhang, M., Tang, S., Li, M., Wu, R., Wan, S., Chen, L., Wei, X., & Feng, S. (2025). Effects and impact of selenium on human health, a review. Molecules, 30(1), 50. https://doi.org/10.3390/molecules30010050

Lippman, S. M., Klein, E. A., Goodman, P. J., Lucia, M. S., Thompson, I. M., Ford, L. G., Parnes, H. L., Minasian, L. M., Gaziano, J. M., Hartline, J. A., Parsons, J. K., Bearden, J. D., III, Crawford, E. D., Goodman, G. E., Claudio, J., Winquist, E., Cook, E. D., Karp, D. D., Walther, P., … Coltman, C. A., Jr. (2009). Effect of selenium and vitamin E on risk of prostate cancer and other cancers: The Selenium and Vitamin E Cancer Prevention Trial (SELECT). JAMA, 301(1), 39–51. https://doi.org/10.1001/jama.2008.864

Rayman, M. P. (2012). Selenium and human health. The Lancet, 379(9822), 1256–1268. https://doi.org/10.1016/S0140-6736(11)61452-9

Shimada, B. K., Alfulaij, N., & Seale, L. A. (2021). The impact of selenium deficiency on cardiovascular function. International Journal of Molecular Sciences, 22(19), 10713. https://doi.org/10.3390/ijms221910713

Sun, Y., Wang, Z., Gong, P., Yao, W., Ba, Q., & Wang, H. (2023). Review on the health-promoting effect of adequate selenium status. Frontiers in Nutrition, 10, 1136458. https://doi.org/10.3389/fnut.2023.1136458

Ventura, M., Melo, M., & Carrilho, F. (2017). Selenium and thyroid disease: From pathophysiology to treatment. International Journal of Endocrinology, 2017, 1297658. https://doi.org/10.1155/2017/1297658

Wang, P., Chen, B., Huang, Y., Li, J., Cao, D., Chen, Z., Li, J., Ran, B., Yang, J., Wang, R., Wei, Q., Dong, Q., & Liu, L. (2023). Selenium intake and multiple health-related outcomes: An umbrella review of meta-analyses. Frontiers in Nutrition, 10, 1263853. https://doi.org/10.3389/fnut.2023.1263853

Wu, R.-R., Li, X., Cao, Y.-H., Peng, X., Liu, G.-F., Liu, Z.-K., Yang, Z., Liu, Z.-Y., & Wu, Y. (2023). China medicinal plants of the Ampelopsis grossedentata—A review of their botanical characteristics, use, phytochemistry, active pharmacological components, and toxicology. Molecules, 28(20), 7145. https://doi.org/10.3390/molecules28207145

Zhang, Q., Zhao, Y., Zhang, M., Zhang, Y., Ji, H., & Shen, L. (2021). Recent advances in research on vine tea, a potential and functional herbal tea with dihydromyricetin and myricetin as major bioactive compounds. Journal of Pharmaceutical Analysis, 11(5), 555–563. https://doi.org/10.1016/j.jpha.2020.10.002

Zhou, F., Lin, Q., Chen, Y., & Gao, F. (2026). Antioxidant properties and correlation with chemical components in selenium-enriched Ampelopsis grossedentata extract. Chinese Journal of Analytical Chemistry, 54(4), 100715.

These three methods do not replace each other. A balanced diet is always the foundation of nutrition. Vine tea is better understood as an herbal tea that blends into daily life, rather than a high-dose nutritional supplement.

The Uniqueness of TeaVita Enshi Vine Tea

Originating from Enshi

The roots of our tea lie in the mountain forests of Enshi, Hubei. The unique selenium-rich geological environment makes Enshi one of China's key selenium resource areas, providing exceptional natural conditions for researching selenium-rich plants. In recent years, studies have directly analyzed Enshi's selenium-rich Ampelopsis grossedentata.

Understanding More Than Just Selenium

Vine tea contains natural flavonoids, represented by dihydromyricetin. Different raw materials, origins, and processing methods affect actual phytochemical components. Therefore, we focus on the source and quality of the product itself, rather than defining a cup of tea by a single ingredient.

Scientific Supplementation Doesn't Mean "More is Better"

Selenium has a relatively narrow optimal intake range, and studies generally emphasize its U-shaped dose-response relationship. For populations that already have adequate selenium status, extra supplementation does not necessarily produce more health benefits (Rayman, 2012; Wang et al., 2023).

A Cup of Tea, Back to Daily Life

Good tea doesn't require complicated rituals. From the initial herbal scent to the smooth taste and lingering sweet aftertaste, we hope to bring the natural flavor of Enshi's wilderness into urban life. We want healthy tea drinking to be a simple, relaxed, and easily cultivated daily habit, rather than an occasional thought. This continues TeaVita's brand language and tasting philosophy.

Our Understanding of "Scientific Selenium Supplementation"

TeaVita does not want to simplify "selenium-rich" into a number where higher is always better. What truly matters is: Is the source clear? Is the intake moderate? Has the product been reliably tested? Does it suit your dietary needs? Therefore, our motto "Selenium-Rich · Scientific Supplementation · Better Life" aims to convey three things:

Understand Selenium: Recognize it as an essential trace element.
Moderate Intake: Know that deficiency needs attention, but excess is unnecessary.
Back to Daily Life: Base it on a balanced diet and naturally integrate a good cup of tea into your life.