Keeping the balance of vitamines
Thus, elevated vitamin B12 is found in serum, yet the B12 is largely inactive,
leading to a condition of Paradoxical vitamin B12 deficiency."
https://www.iomcworld.org/articles/paradoxical-vitamin-b12-deficiency-normal-to-elevated-serum-b12-with-metabolic-vitamin-b12-deficiency.pdf
Thus, elevated vitamin B12 is found in serum, yet the B12 is largely inactive,
leading to a condition of Paradoxical vitamin B12 deficiency."
https://www.iomcworld.org/articles/paradoxical-vitamin-b12-deficiency-normal-to-elevated-serum-b12-with-metabolic-vitamin-b12-deficiency.pdf