For patients pursuing systemic regenerative or wound-healing protocols, injectables have a legitimate role under physician supervision, but if you are asking about wrinkles, skin firmness, or hair thinning, topical is the right delivery method
Transdiagnostic brain mapping in developmental disorders
A patient with unexplained fatigue should be worked up, not injected masking a B12 deficiency of unclear cause, or an unexamined thyroid problem, with a monthly shot is a real clinical risk
The color coding system makes it much harder to accidentally inject the wrong dose, which is especially important for people titrating up through the dose schedule
Current research on BPC-157 is shown in the table below
B12 injections are injected into the muscle and dispersed over time, therefore bypassing the digestive tract, so you get much higher absorption than you would orally