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)
The upper arm is often used for adults who are young or middle-aged
Vitamin D is fat-soluble and can accumulate to toxic levels, causing nausea, weakness, and kidney damage
Take a reference photo of each new vial When you receive a new vial, photograph it immediately