To absorb vitamin B12 effectively, your body requires an intact stomach and gut, a well-functioning pancreas, and sufficiently high levels of intrinsic factor, a protein that binds to vitamin B12 in the stomach (1)
The most common side effect is some soreness at the injection site, and you might notice your urine turning bright yellow (thats just the excess vitamins, particularly riboflavin, being excreted)
Alcohol use disorder: Alcoholism can interfere with vitamin B12 metabolism
Then, inject the medication at a 90-degree angle into the muscle
Typically, B12 injections contain a higher concentration of the vitamin compared to oral supplements to ensure adequate absorption
Body processes slow down when these reactions take longer to complete