medik8 ctetra lipid vitamin c antioxidant serum 30ml C-Tetra® – Defend against the visible effects of premature skin aging and achieve accelerated skin brightening with a next Medik8 C-Tetra Lipid Vitamin C
Description
Bibcode:1991BBRC..179...78H

Vitamin B Complex contains a particular blend of injectable B Vitamins, and each one of them serves a specific function

R.ZhuL.ChenH.WenL.LaumetG.PanH

In this case it means that vitamin C can interact with other oxidizing agents and break down, potentially rendering it useless, or worse, damaging to the skin