Large amounts of B12 can potentially interact with some drugs used for diabetes, heartburn, seizures, and more
What are the benefits of a Vitamin B12 Shot
Although the vitamin sounds like a single vitamin, there are in fact eight B vitamins that are more of less prevalent in different foodstuffs, and regularly added as fortification to breads and cereals, for example - thiamin (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate/folacin or folic acid (B9) and cobalamins (B12)
This is uncommon, but it is a reason to address a deficiency before it progresses
Generic products will be as effective and less costly
These candidates typically include people who are less able to get B12 naturally from their diet