B12 injections have no risk for overdose because excess vitamin B12 is just excreted in the urine
A young kid doesnt have a fully developed immune system until they are about one years old and their rumen is still developing, if they go off feed, it is especially problematic
Twenty-six hours post-infection, stable pools of cells were selected with 1.2 g/mL puromycin (Invitrogen, San Diego, USA) for MCF-7 cells and 1.4 g/mL puromycin for ZR-75-1 cells for 3 days or 100 g/mL hygromycin for MCF-7 and ZR-75-1 cells for 7 days before being used for subsequent experiments
Loren Pickart, the researcher who first isolated GHK-Cu, wrote that "the peptide likely acts as a damage signal, alerting the body to a need for repair" rather than as a direct pharmacological agonist
doi: 10.1186/s12974-016-0621-8 155 MottaC
For example, after a set of squats, jot down if you maintained a straight back or if your knees stayed in line with your toes, and use this feedback to make incremental improvements