As there was most likely Nitrous Oxide in the anaesthetic gas for your operation , it will have have depleted your B12 , and it would be good to replace it with B12 injections . No reason not to do this .
I just had cataract surgery on both eyes, and felt like I really needed a top up, if nothing else I think the stress and anxiety of the procedure has a huge effect on your body. Happy healing.
I am not medically trained, but it seems to me that healing requires creation of new cells, and creating new cells with accurate copies of DNA requires B12.
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