Our advanced full spectrum formulation containsALL essential vitamins (A,C, D, E, PLUS the essential B vitamins; B1, B2, B3, B6, B9 (Folic Acid) and B12). What Is BioPharm-X™ A to Z Multivitamin?. Vitamin B1 (Thiamine)is 1 of 8 essential B vitamins that are utilised by nearly all cells in the body.