Appetite suppression deepens, heart-rate effects become more visible, and gut symptoms can return after each increase
A multiple sclerosis suited toxic rat model, cuprizone (compared with standard, a several times higher regimen, 2.5% of diet regimen + 1 g/kg intragastrically/day) was combined with BPC 157 (in drinking water 0.16 g or 0.16 ng/ml/12 ml/day/rat + 10 g or 10 ng/kg intragastrically/day) till the sacrifice at day 4
Not every month but definitely several times a year
There is research suggesting that methylcobalamin may be particularly supportive in neurological conditions compared to cyanocobalamin, likely because of its direct involvement in methylation and nerve tissue repair
The key takeaway is that under normal usedrawing from an aluminum-covered vial into a transparent syringe and injecting within a minute or sothere is nothing to worry about
For a wider look at how researchers structure multi-compound studies, see Peptide Mind's overview of peptide stacks