Tea shown to provide ample daily supply of fluoride
Traditional black teabags were shown to supply the body with recommended amounts of fluoride, which strengthens enamel and prevents tooth decay. The British study found supermarket brands and decaffeinated teas contained the highest amount of fluoride, because the latter ones contain stronger flavored leaves that have more opportunity to take up fluoride from the soil. These were found to contain well above 1mg of fluoride per cup, compared with 0.5-0.8mg for specialty and single estate teas. In either case, about four cups would be sufficient to received the daily recommended dose. However, previous studies have shown that supermarket teabags containing high amounts of fluoride can result in excess consumption, which can result in higher risk of bone and dental diseases.