Therefore, there is a very low risk of B12 toxicity, even at high doses like 1,000 mcg a day
Any significant deviation from the initial appearancesuch as darkening, fading, cloudiness, or particle formationshould prompt immediate contact with the compounding pharmacy before administration
Some blends may also include other supportive B vitamins
After having a B12 shot, a person should monitor for adverse symptoms and seek medical help if they experience: severe pain at the injection site mild diarrhea a swelling sensation in the body temporary itching of the skin In rare cases, a person may also be at risk of: pulmonary edema peripheral vascular thrombosis, which involves blood clots polycythemia vera, which is a type of blood cancer If anyone experiences difficulty breathing, hives, and swelling, they need emergency medical help
For vitamin B 12 labeling purposes, 100% of the daily value was 6.0 g, but on 27 May 2016, it was revised downward to 2.4 g (see Reference Daily Intake)
