Your body will simply excrete the excess B12, as its a water-soluble vitamin
The 50mg starting dose provides effective NNMT inhibition for most individuals while maintaining an excellent safety margin
"Pernicious Anemia", StatPearls , Treasure Island (FL): StatPearls Publishing, PMID 31082033, retrieved July 15, 2025 "Vitamin B12 or folate deficiency anaemia Diagnosis"
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The Bottom Line Understanding how to give a B12 injection properly gives you control over your energy, cognitive function, and long-term nerve health without the hassle of weekly clinic visits
This drop may manifest as sluggishness, shortness of breath, or trouble staying focused on regular tasks