Large amounts of caffeine may lead to nervousness, restlessness and may disturb your sleep. Though there are lots of good things about consuming tea, overdoing it can put your health at risk. Too Much of a Good Thing: Health Risks of Tea At this time, it is unknown if tea drinking can reduce your risk of cancer. Some studies suggest that tea drinkers have a lower risk for certain types of cancer, but other studies do not support these findings. Though there is lots of information online about tea as a cancer-fighting beverage, research has not proven that consuming tea helps to reduce the risk of cancer.
More research is needed on the amount of tea and type of tea, especially since some of the results have involved tea in the form of a supplement instead of a drink. Researchers are also evaluating if spearmint and chamomile herbal teas have a role to play in preventing diabetes. However, these findings have mainly been based on practices in other countries and not repeated in clinical trials. Some studies suggest that the catechins in green tea may help to keep blood sugar in check, reducing the risk for developing Type 2 diabetes. The research relating to diabetes is less clear. Some research has shown a reduced risk of heart disease in people who drink green or black tea regularly although the findings have been mixed in terms of tea’s effect on lowering cholesterol and blood pressure. Tea drinkers may be helping to keep their hearts healthy. Also of note, research is lacking to support the wide range of herbal tea products advertised for weight loss and these can be harmful depending on their ingredients. Plus, the results have been minimal – only one to two pounds of additional weight loss. Though the research on caffeinated green tea looks promising, there are still a lot of unanswered questions. Decaffeinated green teas did not appear to produce the same results. Though the jury is still out, some studies suggest that the caffeine and catechins, a type of polyphenol, in tea may help with weight loss. Additionally, research suggests that green teas offer a greater antioxidant punch compared to most other varieties. Thus, tea powders, decaffeinated teas and bottled tea drinks may not offer the same health benefits. These substances are antioxidants, compounds that may help reduce the risk of certain chronic diseases.ĭuring processing, some of the polyphenols in tea are destroyed. Natural substances, called polyphenols, are found in both caffeinated and herbal teas. Tea is also a source of fluoride, but the amount can vary depending on the type and the amount of water that is used to make it. For instance, there are only about 5 milligrams of calcium in one cup of herbal tea, such as chamomile. The actual amount varies depending upon the age and growing conditions of the tea plant. Decaffeinated black, green, oolong teas contain very small amounts of caffeine.īoth caffeinated and herbal teas may provide very small amounts of minerals such as potassium, phosphorous, magnesium, sodium, copper and zinc.Oolong provides about 38 milligrams of caffeine per cup.In a cup of green tea, there are only 29 milligrams.An equal amount of black tea has around 48 milligrams.One 8-ounce cup of coffee contains about 95 milligrams of caffeine.Caffeinated teas typically have less caffeine than coffee: The longer the tea steeps, the greater the caffeine content. However, the caffeine content also relates to the brewing process. Black tea has more caffeine than green tea. Chamomile is made from the plant’s flowers and peppermint from the leaves of a mint plant.īlack, green and oolong tea all contain caffeine. Chamomile and peppermint are two popular herbal teas. These teas are products of the roots, leaves, flowers and other components from a variety of plants. Herbal teas, however, are not made from the same plant. The unique flavor profiles for each of these teas are due to differences in how the leaves of the Camellia sinensis plant are processed. In contrast, in Asia, green tea is the more common variety in Southern China, oolong tea tops the charts.īlack, green and oolong tea are made from the same plant. In the US, black tea consumption far outweighs the other two types of tea. The most common types of caffeinated teas are black, green and oolong and the popularity of each type varies geographically. population enjoys a tea beverage every day.
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