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When to see a doctor Signs that warrant a doctors review Unexplained weight loss Night sweats Unusual bruising or bleeding Persistent fatigue together with an abnormal full blood count Yellowing of the skin or eyes, or swelling of the abdomen A high B12 in someone taking no supplements, no injections and no fortified products Outside these situations, a high B12 in someone who takes a supplement is not an emergency
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Giving Yourself B12 Injections Your doctor, a nurse practitioner or a registered nurse can teach you how to administer the injections by yourself
PMC 6494183
[8] However, these findings come from limited, early-phase human studies and should not be taken as established clinical evidence
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