We strongly recommend a private blood test to establish your baseline B12 levels before beginning treatment
Among users who post about side effects, the most-discussed run nausea, fatigue, GI-other, anxiety, diarrhea, constipation, menstrual changes, and reflux/burps, in that order
Vitamin B12 can only be found in animal products, such as eggs, dairy, fish, milk, and red meat
So, its still like, I hate to say, a dark market kind of thing or black market kind of thing, but thats kind of like what it seems like right now
What Are the Symptoms of Vitamin B12 Deficiency
Another reason you might opt for vitamin B12 injections over oral supplements: B12 injections are required less frequently than oral supplements