Vitamin B12 Cyanocobalamin 1% is a manufactured version of Vitamin B12 that many use to address B12 deficiencies. Vitamin B12 deficiencies are relatively common due to low dietary intake and are especially prevalent in vegetarians and the elderly [1, 3]. The benefit of adding Vitamin B12 Cyanocobalamin 1% to your dietary regimen is that it is more bioavailable in supplement form than when acquired through food consumption.