In one study, BPC-157 was administered via intraperitoneal, oral, or topical route following surgical resection in rats
The packaging may also include a sterile syringe and needle for injection, as well as a package insert that contains information on dosage, administration, and potential side effects
The key point: the best option depends on the reason for low B12 and your clinical context
If you do have a vitamin B12 deficiency, it will show up in different dermatological areas

1) Targets Fat Metabolism (AOD 9604) Supports pathways commonly associated with: fat breakdown stubborn fat reduction support lean tissue protection during dieting 2) Supports Energy + Metabolic Flexibility (MOTS-c) Supports: mitochondrial energy production better fuel utilization (carbs + fats) metabolic resilience during stress, dieting, or busy seasons 3) Supports Visceral Fat + Midsection Goals (Tesamorelin) Supports: visceral fat reduction in certain individuals midsection-focused body composition goals metabolic pathway support under provider guidance 4) Supports Recovery + Sleep (Ipamorelin) Supports: deeper, more restorative sleep better recovery between workouts improved consistency (because you feel better while leaning out) In simple terms: AOD + MOTS-c help the metabolism feel on, Tesamorelin supports midsection/visceral fat goals, and Ipamorelin helps you recover and sleep so you can stay consistent

In addition to limited absorption via the IF, the intake of high-dose supplements leads to passive diffusion, i.e., the vitamin can freely enter the bloodstream without IF binding and receptor uptake