When cyanocobalamin enters your body, its converted into either methylcobalamin or adenosylcobalamin, which are the two active forms of vitamin B12 in humans ( Unlike cyanocobalamin, methylcobalamin is a naturally occurring form of vitamin B12 that can be obtained through supplements, as well as food sources like fish, meat, eggs, and milk (3, SUMMARY Cyanocobalamin is a synthetic form of vitamin B12 found only in supplements, while methylcobalamin is a naturally occurring form that you can get through either food sources or supplements
If you increase dose and change timing simultaneously, you cannot determine which change affected results
Laboratory Stability and Research Quality This research product is manufactured according to strict laboratory quality assurance standards designed to support scientific reproducibility, purity, and dependable molecular consistency
[15] Several related species behave similarly to function as vitamins
References : Office of Dietary Supplements, NIH