Hi, I was diagnosed with vitamin D and B12 deficiency. My level was 9 it increased to 17.9 for vitamin D in 10 days. Took one inj for D3 6 lakh. And taking uprise 60k once a week. For B12 my levels when got checked first was 241, was taking mecovion orally. Once a day. My levels for B12 dropped to 167 in 10 days. Is it alarming? Started taking injection for B12 as well. Neurokind 500 mcg. Twice a week. With continuing the mecovion medicine and Omega 3 fatty acids as well. Need suggestions why B12 dropped from 241 to 167 in 10 days even after 1500 mcg daily for B12.  Please suggest. Symptoms : weakness. No appetite still. Metallic taste in mouth, anxiety problems and forgetfulness issues.