ISSN 1460-2393
That is a very concentrated solution
There is an association with gastric antral vascular ectasia (which can be referred to as watermelon stomach), and pernicious anemia
[6] [3] [10] A mild deficiency may not cause any discernible symptoms, but moderate deficiency can cause various symptoms, such as feeling tired, lightheadedness, headaches, cold intolerance, pale skin, sore tongue, upset stomach, loss of appetite, hair and skin color changes, numbness or tingling (pins and needles) of the fingers and toes, and tinnitus, and vision, cognitive or psychological problems
Clinical evidence does not demonstrate that methylcobalamin is significantly more effective than cyanocobalamin for most people