Assertion: nitrous oxide's use | /r/HasSubevent | vitamin b12 deficiency
Facets:
Source sentences:
text: In addition to the above-mentioned immediate and relatively short-term effects, repeated use of whip-its drug can lead to vitamin B12 deficiency, anemia, bone marrow depression, and peripheral neuropathy (tingling in the tips of the fingers and toes).
text: Chronic, regular heavy use is very rare, but can lead to a vitamin B12 deficiency.