My Vitamin B-12 level was 225 pg/ml (ref. 211-900 pg/ml). After taking Nurokind OD as suggested by family doctor for 50 days , it only increased to 310 pg/ml. Earlier, problem was shortness of breath, weakness, balance problem,etc. While the medication was on, All symptoms gone. But it's been 10 days when I stopped Nurokind and from yesterday symptoms again started i.e. balance problem, sometimes shortness of breath, anxiety, etc. Can I continue this medicine or do u recommend any other?