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In fact, one study found that peoples bodies absorbed about 49% of a 1-mcg dose of cyanocobalamin, compared to 44% of the same dose of methylcobalamin ( Conversely, another study comparing the two forms reported that about three times as much cyanocobalamin was excreted through urine, indicating that methylcobalamin may be retained better within your body ( However, some research suggests that differences in bioavailability between the two forms may be insignificant and that absorption could be influenced by factors such as age and genetics ( Unfortunately, recent research directly comparing these two forms of vitamin B12 is limited

Available at: LinkOpens in New Tab Li H, Toh PZ, Tan JY, Zin MT, Lee CY, Li B, Leolukman M, Bao H, Kang L

Men's bodies typically contain more body water (61% vs 52%) and will be able to dilute the alcohol more

Further, the elderly population is, as a statistical matter, at higher risk of malnutrition, as compared with younger adults