can you overdose b12 injections Should we be concerned about getting too much vitamin B12? Vitamin B12 Injections: Hot Shots?

BMI 30 : Must also have heart failure, uncontrolled high blood pressure, or chronic kidney disease

The hypothesis that B12 downregulates inflammatory genes of COVID-19 via methyl-dependent epigenetic mechanisms was proved by the hypermethylation of three CpGs located in the 5 UTR region and in the proximal portion of the first exon of CCL3 (Chr17: 36,090,276 - 36,090,005) of leukocytes from cultures of MOD and SEV groups treated with the vitamin

[5] Disruption of these pathways leads to accumulation of homocysteine and methylmalonic acid, metabolic signatures linked to megaloblastic anemia and demyelinating neuropathy

Also the NHS, the UK healthcare system, mentions that both B12 deficiency and folate deficiency are affecting around 1 in 10 people aged 75 or over and 1 in 20 people aged 65 to 74

[2] Nitrous oxide overdose or overuse converts the active monovalent form of vitamin B 12 to the inactive bivalent form