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hydroxo-b12 injection how to use B12 Injections at Home - Safety Guide for Self-Administration B12 Shots at Home: How,
Description
The critical difference is mechanism type

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Slower Results : It can take longer to experience the benefits of oral B12 supplementation compared to injections, especially if B12 levels are already very low

The ferritin level distinguishes them
"Anaemia and related nutrient deficiencies after Roux-en-Y gastric bypass surgery: a systematic review and meta-analysis"

Oral supplements can help some individuals maintain their B12 levels, but injections are often more effective for people who struggle with absorption or have more severe deficiency symptoms
