The Impact of Black Tea and Fruit Tea on the Body

The earliest references to tea appear in writings from around the 3rd century. The most renowned among them is the Chajing, or "The Classic of Tea," which is entirely dedicated to the origins, cultivation, harvesting, and processing of tea leaves. It also includes a recipe for brewing tea and a comprehensive breakdown of its composition. Tea consumption is a fundamental aspect of Chinese culture, carried out with meticulous attention to detail. The process involves specific teaware, tea variety selection, brewing techniques, and various ceremonial practices. Initially, tea in China was consumed as a powder, sometimes enriched with sweet potatoes, rice flour, fats, cinnamon, or mandarin peel. Later, the practice of using dried leaves steeped in boiling water became prevalent. Tea was initially favored by the upper echelons of society and eventually became a popular offering for guests. It reached Europe through trade in the 17th century and arrived in Poland from France during the reign of Jan II Casimir. Due to its high cost, tea consumption was initially limited to the royal court. Based on production methods, six primary types of tea are distinguished: green tea, which is unfermented and dried in copper vessels, oolong tea, which is partially fermented, floral tea, black tea, yellow tea, and white tea. Each type is characterized by unique processing methods and distinct flavor profiles. Tea is rich in bioactive compounds, with polyphenols and alkaloids being particularly noteworthy.

To properly brew black tea, first preheat the cup or teapot with hot water, then discard it. Into the warmed vessel, add the tea leaves and begin the steeping process. After consuming the beverage, if immediate re-steeping is not planned, pour out the water, leaving only the leaves at the bottom. Later, you can re-steep the tea with hot water to enjoy its rich flavor, aroma, and health benefits. Brewing methods and vessel selection depend on the tea type. For black tea, porcelain, ceramic, or clay teapots are ideal, as they preserve its natural taste and fragrance.

In Poland, teas are predominantly produced by international corporations. The leading global tea producers in 2018 were China, India, and Kenya. Approximately 80% of production consists of black tea. The highest consumption occurs in the UK, followed by Russia, with Poland in third place. The average Pole consumes around 50 cups per month. Black tea contains polyphenols that counteract oxidative stress and slow cellular aging. Additionally, they exhibit anti-inflammatory effects, lower cholesterol levels, and positively influence gut microbiota. The longer the infusion (ideally 10 minutes), the more polyphenols are released. One cup provides 200 mg of flavonoids. Maximum antioxidant activity is observed 30–50 minutes after consumption. Caffeine content depends on brewing time: 15 seconds yields 15 mg, while 5 minutes results in 34–38 mg. The leaves contain calcium, zinc, magnesium, fluorine, chromium, and selenium, though they are not significant sources. High oxalate content may form insoluble salts, increasing kidney stone risk. Theaflavins and thearubigins demonstrate anti-cancer, anti-atherosclerotic, and anti-inflammatory properties. Research indicates they reduce blood glucose, combat obesity, and lower ovarian cancer risk. Regular intake decreases LDL without affecting HDL. Not recommended for those at risk of anemia but beneficial for hemochromatosis. It enhances the body's antioxidant potential without adding calories (without sugar). Due to caffeine, no more than 8 cups should be consumed daily.

Fruit tea presents a compelling alternative to conventional tea, particularly during colder seasons. Despite its name, it is not a tea in the traditional sense but rather a blend of dried fruits, occasionally enhanced with herbs and spices. It is important to distinguish it from flavored teas, which primarily consist of black tea leaves with fruits serving as a minor addition. Some blends may even use artificial flavorings instead of real fruit. Common ingredients include hibiscus, apples, rosehips, raspberries, chokeberries, elderberries, currants, and blackberry leaves (A. Adamczak, A. Forycka, W. Buchwald 2015). These components contain phenolic compounds that exhibit antioxidant and preservative properties. Additionally, spices such as cinnamon, ginger, cardamom, or ginseng are added to enhance flavor and aroma. Hibiscus, frequently included in these blends, contains anthocyanins—health-promoting compounds that give the infusion a vibrant color. It also imparts a slightly tart taste. It is worth noting that the ingredients in fruit teas may interact with medications. Some, like licorice, pose risks for individuals with hypertension, kidney, or liver conditions. Reviewing the composition before consumption is advisable. December 15th marks International Tea Day—a perfect occasion to appreciate tea's flavor, aroma, and health benefits. Regular, moderate consumption of fruit and black tea supports hydration and provides enjoyable sensory experiences. However, it is essential to remember that water remains the most effective hydrating beverage and should form the basis of daily intake.