Researchers are studying this pathway for possible effects on fat tissue, NAD+, and metabolism, but human benefits are not established
"Changes to the Nutrition Facts Label"
According to StatPearls (NCBI Bookshelf), the most common adverse effect of intramuscular vitamin B12 injections is significant pain at the injection site, which is particularly noted in thinner individuals
Rich Dietary Sources of Vitamin B12 Vitamin B12 is usually found in fortified foods and animal foods, such as meat, fish, eggs, and dairy products
Each has its own features
When to seek medical help See a doctor promptly if you have spreading redness or warmth around the site, discharge or a fever, numbness or weakness that does not settle, or any swelling of the face, lips or throat or difficulty breathing, which can signal a rare allergic reaction and is a medical emergency