Other rare but serious complications include infection at the injection site (abscess formation) and, in isolated reports, neurological effects
Additionally, inadequate protein intake can lead to muscle loss and weakness, while insufficient iron, vitamin B12, or vitamin D can cause fatigue
I did have a bit of a learning curve in the beginning when I was still eating how I previously did, and every time I overate I got nauseous, but that helped me realize I was overeating
Oral versus intramuscular administration of vitamin B12 for the treatment of patients with vitamin B12 deficiency: a pragmatic, randomised, multicentre, non-inferiority clinical trial
(8) Research has demonstrated that SAM is a universal methyl donor required for numerous cellular methylation reactions including DNA and histone methylation
Meanwhile, what makes vitamin B12 stand out from other B vitamins is that this vitamin is almost exclusively found in animal-derived foods