The degree of abnormalities in the microbiome was directly related to the severity of symptoms , including pain intensity, cognitive dysfunction, and fatigue
Medical conditions: Certain medical conditions, such as Crohns disease, celiac disease, and HIV infection, can interfere with the absorption or metabolism of vitamin B12
It is also added to certain breads and breakfast cereals that are usually called fortified
In the UK, the most commonly used injectable form of vitamin B12 is Hydroxocobalamin injection
It's involved in cellular energy production and can be beneficial for individuals with fatigue or mitochondrial disorders
[1] Unlike fat-soluble vitamins that accumulate in body tissues, water-soluble vitamins are generally excreted through urine when consumed in excess