It raises IGF-1 levels (which can drive cell growth), can affect blood sugar regulation, and carries risks of promoting unwanted tissue proliferation
For this reason, patients with Parkinsons disease on levodopa therapy should avoid high B intake unless they are also taking carbidopa (which prevents this interaction)
But what is B12 MIC, and why are people all over Scottsdale coming into Prana for their B12 MIC injections
BPC-157, KPV, TB-500, MOTS-c, Epitalon and Semax remain unapproved drugs
So the practical takeaway is not oral is better or SC is better. It is: pick one route, follow the documented per-dose figure for the vial you have, and keep the route constant so that whatever you observe is not confounded by a mid-stream route change