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Experimental evidence from knockout models suggests that reduced NNMT activity is associated with resistance to tumor formation, leading to speculation about a possible role for this enzyme in cancer biology

PMID: 17703734

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While limited evidence supports this, the practice is common

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In that case, self-injection method is a feasible way which can be easily done by following the underlying steps: Woman performing self-injection- Picture Courtesy: gonoble.com Step 1: Gather Necessary Tools Wash and dry your hands properly