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For group “2B” it is necessary to have limited evidence of carcinogenicity in humans and sufficient evidence of carcinogenicity in laboratory animals. It goes without saying that even if there is no direct evidence that these things are carcinogenic in humans, or there is strong evidence that their carcinogenic mechanism can exist in humans, they may fall into that category.
For example, this was added to group 2B after a two-year study in rats showed that colon cancer was more likely in rats that drank drinking water containing aloe vera leaf extract.
More importantly, other research has shown that some of the chemicals in aloe vera are converted into substances that can damage DNA; Therefore, they are likely to cause cancer in both human and mouse intestines. Therefore, there is evidence of possible carcinogenesis in animals and it can be said that it is theoretically possible for this to occur in humans.
Besides ferns and pickled vegetables, some of the more important things in Group B include progesterone-only birth control pills, radiofrequency magnetic fields, and naphthalene.
Additionally, the list includes a number of herbal compounds such as kava extract, which has been used as an invigorating drink in the South Pacific Islands for centuries, as well as ginkgo biloba extract and golden hog root powder, which are sold as herbal medicines.
Finally, a number of professions and activities are also in group 2B. In addition to carpentry and carpentry and working with bitumen, the World Health Organization also classifies laundry and textile industries as possibly carcinogenic to humans.
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