Sensitive compounds are shipped using temperature-controlled packaging, including dry ice or insulated cooling materials, to help preserve integrity until delivery.
Requirements of vitamin B12 in excess of normal (due to pregnancy, thyrotoxicosis, hemolytic anemia, hemorrhage, malignancy, hepatic and renal disease) can usually be met with oral supplementation
Itoh K, Freter R (1989) Control of Escherichia coli populations by a combination of indigenous Clostridia and Lactobacilli in gnotobiotic mice and continuous-flow cultures
BPC-157 may just be one of the most promising up and coming plumbers, but until there have been more background checks, validated permits, and supervision of its work in human trials, its best to hold off on calling it for any repairs