The difference is 2.3 percentage points
Dalton SE, Pietro OD, Hennessy E
A controlled trial published in Human Physiology (Dolotov et al., 2006) showed that intranasal Semax at 200 mcg twice daily increased BDNF expression in the basal forebrain by approximately 70% over a seven-day period in patients with ischemic stroke

Chan School of Public Health: "Vitamin B12." Inflammatory Bowel Diseases: "Prevalence of and risk factors for vitamin B(12) deficiency in patients with Crohn's disease," "Vitamin B12 deficiency in inflammatory bowel disease: prevalence, risk factors, evaluation, and management." MedlinePlus: "Cyanocobalamin Injection." National Health Services: "Hydroxocobalamin," "Treatment -Vitamin B12 or folate deficiency anaemia Contents," "Vitamin B12." Nutrition Reviews: "How prevalent is vitamin B(12) deficiency among vegetarians?" Surgery for Obesity and Related Diseases: "Vitamin B12 deficiency in patients undergoing bariatric surgery: preventive strategies and key recommendations." The American Journal of Clinical Nutrition: "How common is vitamin B-12 deficiency?" The American Journal of Gastroenterology: "Vitamin B12 deficiency in untreated celiac disease." Top B12 Injections Who Get Them, How Quickly They Work Related Articles 22 Healthy Foods High in B VitaminsAny deficiency of B vitamins can lead to various health conditions

Side effects are typically mild and may include redness or swelling at the injection site, headaches, or digestive discomfort
Bacteriostatic water is the only correct choice for a 30 mg vial that you will draw from multiple times over weeks