how much b12 injection per day Many mcg of Day: UK Requirements and Guidance – Bolt Pharmacy B12 Injection Dose: 7 Guidelines
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There are no studies showing that taking B12 if your levels are normal will help your nails grow stronger or longer

Doets EL, Int Veld PH, Szczecinska A, et al

It also helps in making red blood cells, which carry oxygen throughout the body

During protein folding stress, the sirtuin SIRT7 also plays an important role by contributing to repressing nuclear respiratory factor 1 (NRF1) activity, a major transcriptional regulator of mitochondrial genes

As shown in Table 1 and Figure 6, in the pursuit of structurally diverse NNMT inhibitors, researchers have identified certain macrocyclic peptides that bind to NNMT, displaying potent inhibition with Half-maximal inhibitory concentration (IC 50 ) values as low as 229 nM (Van Haren et al., 2021)

Reference sources: Sigma-Aldrich 5-Amino-1MQ (SML2832) | NIH PMC NNMT Inhibitor Research Regulatory Notice 5-Amino-1MQ is an unapproved new drug compound
