Re-ingestion allows for absorption of nutrients made available by bacterial fermentation, and also of vitamins and other nutrients synthesized by the gut bacteria, including vitamin B 12
The tabular data were processed with the Huttenhower labs linear discriminant analysis (LDA) effect size (LEfSe) tool via the Galaxy module (v1.0) 38
Methionine also reduces the level of histamine in the body which may be beneficial for anyone with chronic allergies or inflammatory conditions
You Suffer From Gastrointestinal Distress If you suffer from a gastrointestinal disorder, such as Crohns disease or celiac disease, you should get a vitamin B12 injection
However, as with any injection, there is a risk of side effects such as pain at the injection site, infection, or allergic reactions
A study found that giving 1000 mcg of B12 intramuscularly is common