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Severe injection site reactions : Mild soreness is normal, but increasing pain, significant swelling, or signs of infection (redness, warmth, discharge) require medical review
Some people do not absorb B12 efficiently due to age, gastrointestinal issues, or insufficient intrinsic factor, a protein required for B12 absorption
Its important to watch how fast its given to avoid problems
While more research is needed to fully understand its effects, here are the top 5 science-backed benefits it may offer
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