Cyanocobalamin is the most common and widely produced form of the chemical compounds that have vitamin B12 activity.
For example, the hadron constituents of atomic nuclei, neutrons and protons, have charges of 0 e and +1 e respectively; the neutron is composed of two down quarks and one up quark, and the proton of two up quarks and one down quark.
Could there be anything smaller inside of an electron or inside of a neutron or a proton? What kinds of quarks are protons and neutrons made of? What was the old name for the Top and Bottom quark? What is the charge of an up quark and the charge of a down quark? How many quarks make up a proton and a neutron? Are quarks confineable for study?