The Benefits Of Vitamin B12 Ugly London. Acupuncture & Chinese Herbal Medicine Taking Vitamin B12? Read this first. While B12 is often hailed as a safe energy and brain booster, many real users are reporting unexpected side effects including anxiety, insomnia, Vitamin B12 injections have been around for years but do you know who benefits most from them? B12 support may be a great option if you: Feel tired or low on Buy Vitamin B12 Injection Online Cyanocobalamin from Canada