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B12 shots take minutes and cost less per session, while IV infusions require 30 to 60 minutes and carry higher price points that reflect their expanded nutrient delivery and medical oversight

Concerns may be higher with drugs that affect metabolism, blood sugar, sleep, or methyl-group pathways

What Is a B12 Shot and How Does It Work

They might need shots more often

The 100mg daily dose provides maximum NNMT inhibition while remaining within established safety parameters

In this guide, we'll break down exactly how long the effects last, how quickly a shot kicks in, how often you can get one, and the personal factors that shape your results