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While all four types of vitamin B12 ultimately serve to prevent deficiency, their bioavailability and absorption rates vary significantly: Synthetic vs
Typically, B12 injections begin working immediately and the body will begin making new red blood cells within 72 hours
Bob Scottland Retired R.N.
Ongoing Support Our nurse can prescribe additional injections after your initial course
UPDATE: Ended up going to see my GP and all he did was recheck my CBC which is still normal and check b12 and folate
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