b12 injections versus oral supplements Efficacy of different routes of vitamin supplementation for the treatment of patients with vitamin B12 deficiency: A systematic review and network meta-analysis B12 Injection vs. Oral Supplements:
Description
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

Some chemotherapy drugs or antiretroviral medications (for HIV) that suppress bone marrow might also blunt the effectiveness of B therapy

In the evaluation of RCT quality, 3 studies scored two points, indicating low-quality study and high risk of bias

Funding This work was supported by grants from the National Natural Science Foundation of China (to L.Y., 82070405
