You feel alert, possibly jittery
It contains methylcobalamin (vitamin B12), pyridoxine (vitamin B6), and nicotinamide, which help relieve symptoms such as numbness, tingling, weakness, fatigue, and nerve pain associated with vitamin B deficiency
They are not to be classified as a drug, food, cosmetic, or medicinal product and must not be mislabelled or used as such
Butterwick, Dr
A 1989 study measured serum ferritin levels of high school cross country runners, and found that 34 percent of female runners and 8 percent of male runners had ferritin levels below 12 ng/mL, which we know is really low so imagine all the other runners who may have had suboptimal levels
Of course, each company wants to claim their product is in some way superior to the others