Min. Order Reference FOB Price
100 kg US$20.00-22.00 / kg
Product Description
Repair nerve vitamin b12 Vitamin B12, also known as cobalamin, is a polycyclic compound containing cobalt trivalent, four reduced pyrrole rings are linked together into a Coo ring (similar to porphyrin), is the only vitamin containing metal elements. Vitamin B12 is a red crystalline powder, ...