This matters because digestion and absorption can affect how much of a nutrient your body actually uses from oral supplements
Keep away from direct sunlight, heat, and freezing
Observed effects in human trials Reported adverse events across the IV and oral trials included headache, fatigue, dizziness, nasopharyngitis, diarrhea, flatulence, increased appetite, nausea, and back pain
Ranson H et al
Read the full study: Achilles Detachment in Rat and Stable Gastric Pentadecapeptide BPC 157 (J Orthop Res 2006)
Recommendation: Test b12, but do not wait for results to make changes