mixing b12 with susta shot?

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is it ok to mix B12 with susta shot or it will mess up the susta i heard before whe mixing B12 with a painful injection like prop or susta it give a pain free shot what do you think?

i'll be injecting 1/2cm susta 125mg .

thanks.

[PT]

its ok to do, meaning it wont hurt the sust at all. but i dont know why you would want to do it. sust dosnt hurt that bad. id only do it with something like t-400.

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no bro i'm not going to do it its just 1/2 cm i wont even feel it but i was just asking just to know about it

by the way i have another question is there a way to use HGH & not to mess up the insulin in your blood (not to be a diabetec)?