can b12 injections make you feel worse

https://el3vate.com.au/api/og-image/product-images/bpc-157-1777939239259.png Size:30ML 19 Early studies: There were studies in the 1950s and the1960s that showed that oral vitamin B 12 could be absorbed by patients with pernicious anemia and could lead to resolution of the anemia oral supplement Optineuron Vitamin B12 Injection 500 mcg/ml (2 ml Ampoule) at ₹ 12/piece in Nagpur

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