b12 injections and acne HELP! I think I developed fungal from : r/Fungalacne Could Vitamin B12 Be Triggering
Description
Where to Get B12 Shots

Having said that I used to sometimes think those injections would work better than some that had been sitting out longer, or maybe it was purely coincidence

The safety data for each compound individually is reassuring, but combination safety requires its own evaluation because pharmacological interactions can produce unexpected results even when each agent is well-characterized on its own

Your primary research question dictates the most appropriate delivery method