In an emailed response to questions from CBC News, Health Canada said it had received four complaints in six months about adverse reactions in people who took unauthorized peptides
"Low Nourishment of Vitamin C Induces Glutathione Depletion and Oxidative Stress in Healthy Young Adults." Prev Nutr Food Sci
Citations Stable Gastric Pentadecapeptide BPC 157: Novel Therapy in Gastrointestinal Tract Sikiric P, Seiwerth S, Rucman R, et al
B12 is especially beneficial for individuals who have difficulty absorbing B12 from food or oral supplements, which can occur due to certain digestive disorders, age-related changes, or specific medical conditions
Cognitive and Mood Disturbances : Vitamin B12 plays a role in brain health, so deficiency can lead to memory problems, difficulty concentrating, depression or irritability