There is no way to know which category you fall into without trying
4 Unlike bioavailable forms of B12 like methylcobalamin, cyanocobalamin occurs only in trace amounts in the body, usually from cigarette smoking or other sources of cyanide
This can help improve efficiency, maintain consistent ratios, and reduce variability throughout research protocols
You may experience severe side effects like: Confusion Dizziness Extreme tiredness Dermatological Effects Most skin reactions from a B12 injection come from an allergic reaction
Some reasons your body may not be able to get enough B12 from food include: Anemia Gastritis Crohns disease Celiac disease Alcohol use disorder Sjgrens syndrome Weight loss surgery, or surgery that removes part or all of your stomach A vegan or strict vegetarian diet (as B12 is only found in animal products) Medications, such as metformin and drugs used to treat gastroesophageal reflux disease (GERD), indigestion, and stomach ulcers Pregnancy Your doctor could also order a B12 test based on your symptoms
Because your body does not readily store excess amounts, toxicity from B12 is very unlikely, even at the higher doses used in injections
