B12 is a must for pernicious anemia, and I am a low-carbohydrate, high-protein dieter, but my blood cell counts such as red blood cells and white blood cells were not stable during blood tests, and I couldn't find the cause. I came across this after reading a lot of literature on molecular nutrition. B12 active supplements are expensive, but this one is good value for money, and the large-volume sublingual type twice a day was sufficiently effective. I am currently using it to improve my elderly mother's MCV value.
