Without IF, vitamin B12 cannot be effectively absorbed from food
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Zheng S, Shen F, Jones B et al (2020) Characterization of concurrent target suppression by JNJ-61178104, a bispecific antibody against human tumor necrosis factor and interleukin-17A
doi: 10.1007/s12035-013-8553-0 183 StanculescuDSeplvedaNLimCLBergquistJ
If you are taking it, adding an annual B12 test to your routine monitoring is the simple solution
According to Healthline, lipotropic injections are not standardized by the FDA, and dosages can vary from clinic to clinic