eCosmetics is an authorized retailer of Barriere.This mini patch is formulated with a full daily dose of vitamin B12 and vitamin B9 (folate), two essential vitamins that work in harmony to support energy metabolism and promote healthy brain and nervous system function.* The patches are u00bd in diameter, made from 100% recycled PET, and come on a clear backing The patches are u00bd in diameter, made from 100% recycled PET, and come on a clear backing.