ascorbic acid and glutathione together Allies of Skin Vitamin C 35% & Advanced Firm + Brighten Serum 1fl. oz Glutathione–ascorbic acid redox cycle and

And if its not for you, return it and get a refund

Extended PPI use frequently leads to B12 depletion

The combination has one preclinical synergy paper but no human trial data of its own

Any assertion to the contrary is not supported by evidence It IS fair to say that there is no clear evidence of harm in a relatively data free zone in humans, and that there is a plausible argument for benefit based upon in vitro and animal studies as well as mechanism of action - particularly with BPC

Here are some key considerations: Allergic Reactions : If you have a history of allergic reactions to cobalt, cyanocobalamin, or any other ingredients in the injection, inform your healthcare provider before starting treatment