Tea has been around for 5,000+ years and has the distinction of being one of the most revered beverages around the globe. Tea is available in various varieties like Black Tea, White tea, Green Tea, herbal Tea, Chai etc. Among all, black tea has been the most commonly consumed beverage all over the world. Black tea is used to improvemental alertness as well as learning, memory and to relieve headaches. Recent research revealed that black tea contains high concentration of fluoride than previously thought and can pose risk in future.
If we talk about fluoride, it is a major ingredient of toothpastes, present in water and upto some extent in food. It is most commonly used for its property of preventing dental cavities. However, excessive consumption of fluoride can pose potential risk to bone health.
Fluoride – recommended dose
The recommended daily dose of fluoride through fluorinated drinking water, toothpaste and food is 2 to 3 milligrams a day. Health experts say that ingesting amount upto 20 milligrams can be safe for few years, however, serious bone health can occur, if ingested about 20 milligrams a day over a period of 10 or more years.
About the study
The study was conducted by researchers of Medical College of Georgia. Researchers tested seven brands of black tea, steeping each for five minutes in de-ionized water, which contains no fluoride. Results...
showed that the amount of fluoride in each sample was 1.4 to 3.3 times higher using the diffusion method than the traditional method.
Earlier published studies have shown 1 to 5 milligrams of fluoride per litre of black tea, but this new study showed that number could be as high as 9 milligrams, which can be harmful in a long run. The findings were presented at the 2010 International Association of Dental Research Conference in Barcelona, Spain.
Is black tea safe to drink?
Dr. Gary Whitford, Regents Professor of oral biology in the School of Dentistry said “The additional fluoride from drinking two to four cups of tea a day won’t harm anyone; it’s the very heavy tea drinkers who could get in trouble,”
Although black tea is most commonly used beverage, but in my view herbal tea or green tea are better choice due to their antioxidant content. If you are a black tea lover, try to reduce your intake or switch to other teas that have demonstrated potential benefits to your health.
Source: Science daily