It is a fragment, isolated and synthesized in a lab
Liver and Spleen Weights Liver and spleen weights are expressed as a percentage of total body weight (for normal rats, liver, 3.24.0%
In other words, we cant directly extrapolate recommendations for vegans from the trials in the graphs above except to know that 500 g per day is enough for vegans based on Crane, 1998
Discussion Using a vitamin B 12 deficiency phenotype definition, consistent with previous reports [1, 2], there were 487 (6.8%) deficient individuals of White European ancestry receiving metformin in the UKB cohort out of a total of 7173
Additionally, vitamin B12 is critical for cellular energy production, as it aids in the metabolism of fatty acids and amino acids (4)