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b12 injection bruise Bruised site with methylcobalamin : r/B12_Deficiency Mystery Bruises: Possible Deficiencies?
Description
However, do not discontinue prescribed B12 treatment without medical advice, particularly if you have pernicious anaemia or confirmed deficiency, as untreated B12 deficiency can lead to irreversible neurological damage

Yes, in effect

Three to four sets of 6-12 repetitions at a challenging weight provides sufficient stimulus

Apply vitamin C first (if using a serum) and then follow with it
