Cobalamin (vitamin B12) and Folate Deficiency Province of British Columbia B12 Folate normal ranges in blood work can be between 220 and 1200. I personally think anything under 600 is too low. B12 injections are the best (by pass digestion) and you can Oral vs. Intramuscular Vitamin B12 in Vitamin B12 Deficiency The Blood Project : Boost Your Energy with ! Feeling constantly tired, low on energy, or struggling with focus? It could be due to a Vitamin B12 deficiency! We're Vitamin B12 Deficiency Harvard Health
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