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If you've been taking oral B12 supplements without feeling a difference, a shot is the most reliable way to find out whether the issue is your B12 levels or something else
Luckily, I was treated well and recovered
Damage to the myelin is why you see neurological abnormalities in B12 deficiency and PA patients
Reusing needles is problematic because they are unsanitary but also because after the first use, the needle is blunted immediately, meaning the next time you use it will be more painful
PubMed Central , StatPearls , StatPearls Publishing, 2026
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