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Description
Who Benefits Most From B12 Shots for Diagnosed Deficiency

Patients experiencing persistent gastrointestinal adverse effects may benefit from slower titration schedules or maintaining lower doses for longer periods before attempting escalation
And yes, you are right

Most B-vitamins seldom make it through the digestive system without being destroyed by stomach acid
How PlexusDx Supports a More Personalized Approach PlexusDx's Precision Peptide Genetic Test includes assessment of metabolic and nutrient utilization pathways that may provide context for how your genetic background influences B12 metabolism, lipotropic compound effectiveness, and overall metabolic support response