<prompt> The following isare a rich source of fluoride:Dried fishTea leavesCabbagesAll of the above  <response>: The dried tea leaves contain 100-400 ppm fluoride, depending on the brand.Fish products, in particular canned fish such as salmon and sardines have a fluoride content of up to 20-40 mgkg. The meat of fish is relatively low in fluoride content 2-5 mgkg as compared with fish protein concentrates, which may contain up to 370 mgkg.Certain plants, such as taro, yams, and cassava, cabbage have been found to contain relatively high fluoride levels.Essentials of preventive and community dentistrySoben Peter5th editionpage no. 243 