When formulating an AHK-Cu dosage guide for dermal studies, concentration is often expressed as a percentage or in parts per million (ppm)
So, in short, despite what fbirder says, yes, vitamin B12 use in the body IS indirectly dependent on iron, as it is on potassium, magnesium and all the other minerals, and folate, vitamin D and all the other vitamins
It is a water-soluble vitamin that you must get from your diet, as your body does not make it
skin flushing is far less common with nicotinamide than with niacin (nicotinic acid)
B vitamins play an important role in many of the body's functions, including energy production, nerve function, cognitive function, immune system function, and the synthesis of hormones and red blood cells