In the world of tea, myths and misconceptions often swirl around, leaving tea enthusiasts confused about what’s true and what’s not. From claims that tea causes osteoporosis to the idea that overnight tea is carcinogenic, these rumors can deter people from enjoying the rich traditions and health benefits of tea. Today, we’re here to set the record straight and debunk some of the most common tea-related health myths. Let’s dive in!

Myth 1: Does Drinking Tea Lead to Osteoporosis?

One of the most persistent myths is that drinking tea, particularly Pu’er tea, can lead to calcium loss and, consequently, osteoporosis. This belief stems from the idea that tea might interfere with calcium absorption. However, scientific research tells a different story. A study involving 487,594 participants who regularly consumed tea or coffee found that drinking 3-4 cups of tea daily (250ml per cup) actually reduced the risk of osteoporosis by 15%. This suggests that moderate tea consumption does not cause calcium deficiency or bone weakening. In fact, experts recommend consuming 5-15 grams of dry tea leaves daily, with a total water intake of 400-1500 milliliters, as part of a balanced lifestyle.

Myth 2: Is Green Tea Harmful to the Stomach While Black Tea Nourishes It?

Another common belief is that green tea, being unfermented and ‘cooling’ in nature, can harm the stomach, while fully fermented black tea, with its ‘warming’ properties, is gentler and even beneficial for digestion. While it’s true that green tea contains higher levels of polyphenols and caffeine, which can stimulate stomach acid secretion, this doesn’t necessarily mean it’s harmful to everyone. The impact of tea on the stomach largely depends on an individual’s constitution. For those with a balanced constitution, drinking green tea in colder weather is perfectly fine. On the other hand, people with a sensitive stomach or those prone to acidity should be cautious, regardless of the tea type. The idea that black tea universally ‘nourishes’ the stomach is also oversimplified, as it still contains caffeine, which can exacerbate acid reflux in some individuals.

Myth 3: Are Tea Foam and Residue Signs of Pesticides?

Many tea drinkers worry when they see foam forming on the surface of their tea, assuming it’s a sign of pesticide residue. However, this foam is actually caused by a natural compound called tea saponin, which has been recognized since ancient times as a sign of high-quality tea. Modern science confirms that tea saponin is not only harmless but also offers health benefits, including anti-inflammatory and antioxidant properties. As for the idea of ‘washing tea’ to remove pesticides, it’s largely unnecessary. In China, tea production is strictly regulated, and pesticide residues are kept well within safe limits. Washing tea is more about rinsing away storage odors or awakening the tea’s aroma, especially in aged teas like Pu’er or Liubao.

Myth 4: Does Brewing Tea in a Thermos Release Heavy Metals?

Thermoses are a popular choice for tea lovers, especially during colder months, as they keep tea warm and convenient. However, some worry that prolonged contact between tea and the thermos might cause heavy metals to leach into the drink. Rest assured, high-quality thermoses made from food-grade stainless steel (like 304 or 316) are designed to resist corrosion. Tea, being a mildly acidic substance, is unlikely to damage the thermos or release harmful metals. As for tea stains, while they may look unsightly, they are primarily composed of harmless elements like carbon, oxygen, and trace minerals. Regular cleaning is recommended for hygiene, but there’s no need to fear carcinogenic effects from tea stains.

Myth 5: Is Overnight Tea High in Nitrites and Carcinogenic?

The idea that overnight tea is toxic due to high nitrite levels has been widely circulated. However, studies, including one featured on CCTV’s Is It True? program, have shown that the nitrite content in overnight tea is significantly lower than the safety limits set for drinking water. For example, even after 24 hours, the nitrite levels in Pu’er and chrysanthemum tea remained below 0.2mg/L, far lower than the 1mg/L limit for drinking water. While nitrites themselves are not carcinogenic, their conversion into nitrosamines (a known carcinogen) requires specific conditions that are unlikely to occur in overnight tea. So, while it’s best to enjoy tea fresh, drinking overnight tea occasionally is not a health hazard.

Conclusion

Tea is a beloved beverage with a rich cultural heritage and numerous health benefits. While it’s important to be mindful of how we consume it, many of the fears surrounding tea are based on misconceptions. By understanding the science behind these myths, we can continue to enjoy tea with confidence and appreciation. Share this article with fellow tea lovers to spread the truth and keep the tea tradition alive and well!

Have you heard any other tea-related myths? Share them in the comments below, and let’s continue the conversation!