how long b12 injection last Do Injections Last? Vitamin B12 Injections: What You

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Precautions Prior to taking vitamin B12, tell the physician that you have: A cold or an allergy that affects your nasal cavity and the signs you develop A kidney disease A liver disease Any kind of infection An iron deficiency A folic acid deficiency An allergy to vitamin B12 or cobalt A lebers disease as cyanocobalamin can trigger optical nerve damage and blindness A pregnancy, a plan to get pregnant or a breastfeeding baby.

(If you are on Facebook, Noodleville Farm has a wonderful post on thiamine as well - just go to her page and search "thiamine.") B Vitamins are water-soluble and excess is excreted through the urine so it is better to guess a bit higher on weight than lower

What Is Vitamin B12 and Why Do You Need It