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Heavy marijuana use linked to gum disease

Science Centric (6 Feb 2008 11:08 GMT) - Heavy marijuana use has been found to contribute to gum disease, apart from the known effects that tobacco smoke was already known to have. In a group of more than 900 New Zealanders, smoking cannabis more than 40 times a year since age 18 was found to be responsible for more than one-third of the new cases of periodontal disease between ages 26 and 32…

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