From the preclinical data for putative benefits there were also important side effects noted
after reconstitution, refrigerate at 28 C (35.646.4 F) , protect from light, and use within 24 weeks
Metformin, a medication for individuals with type 2 diabetes mellitus, was found to decrease vitamin B 12 absorption possibly by tying up free calcium required for absorption of the IF-B 12 complex (143)
Maintaining cellular health : Enough NAD+ is vital for energy metabolism and cellular health
B12 bound to HC is not taken up by cells and thus, is biologically inactive ( via endocytosis using a specific CD320 receptor ( via CblF ( This free cytoplasmic B12 undergoes a series of intracellular transport and modifications to enable two core enzymatic reactions: 1) adenosyl-B12 acts as a co-factor for the enzyme methylmalonyl-coA mutase that catalyzes the conversion of methylmalonyl-coA to succinyl-coA, thereby enabling restoration of tricarboxylic acid (TCA) cycle intermediates and 2) methyl-B12 enables methionine synthase in the re-methylation of homocysteine to methionine using methyl-tetrahydrofolate (MTHF) as a methyl donor, thereby enabling the vital biochemical pathways of the folate cycle and methionine cycle, facilitating the downstream synthesis of important compounds like DNA and RNA (Figure 2)
