Too Much Vitamin B12: Is It Bad for Your Health? DripGym B12 Shots for Weight Loss: What You Need to Know ISSA B1, B6 & B12 Vitamins for a Healthy Nervous System Neurobion 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, Inj Polybion Made Easy Pharmacology Notes , Struggling to remember Vitamin B complex injections? , Heres a quick and aesthetic revision of Inj Polybion , Composition (B1, B6, B12), Uses &