For example, if you have pernicious anemia, you might need injections for life
You may be at higher risk if you: Follow a vegan or vegetarian diet Eat very little meat, fish, eggs, or dairy Are over the age of 50 Have digestive conditions affecting absorption Take certain medications, such as metformin or acid-reducing medicines Have had certain stomach or bowel surgery Have pernicious anaemia or absorption problems People in higher-risk groups may benefit from advice, testing, or treatment depending on their symptoms and medical history
(c) case-control studies
Highly absorbable, long-lasting, and safer than high-dose oral supplements
Hydroxocobalamin lasts longer, meaning you might need fewer shots
The usual B12 solution is 1,000 mcg/mL