DNA and Genetics

Methylcobalamin is preferred over cyanocobalamin for people with SNPs affecting B12 conversion, since cyanocobalamin requires the enzymatic conversion that the SNP impairs. Two delivery formats are under consideration: a separate dedicated YouTube channel or integration into the existing channel. The learning curve for genetics content is substantial, requiring deep understanding before simple explanations can be produced. Variants in genes involved in B12 absorption, conversion, or activation can significantly impair B12 uptake even with adequate dietary intake. An MTHFR SNP reduces activated folate availability, which ultimately reduces serotonin precursor availability because tryptophan hydroxylase 2 requires activated folate as a cofactor. A SNP in the tryptophan hydroxylase 2 gene can cause up to 80% loss of serotonin biosynthetic function at the rate-limiting step. SNPs that increase MAO enzyme activity accelerate catecholamine breakdown in the CNS, increasing depression incidence. The MTHFR C677T SNP is present in up to 20% of the general population; homozygous carriers lose 40–70% of enzyme function. Homozygous MTHFR TT individuals carry a 1.3× increased risk of depression…