without this transfer of single carbon units involving b12 and its partner b9 otherwise known as folic acid heart disease vitamin b12 in 3d im a food addict we all are our brains are biologically driven to seek and devour highcalorie fatty foods the difference is that i have learned how to control those primitive parts of my brain anyone can do this if they know how how to rewire your brain to end food cravings plus many of us have gained weight and lost the time to exercise over the years weakening our back muscles is it any wonder your complete guide to a healthy back