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Short answer: If you can absorb B12, high-dose oral B12 (1,0002,000 mcg/day) is as effective as intramuscular injections for normalizing levels in most people (AAFP
9 , e000611 (2022)
Ghanizadeh A, Mohammadi MR, Bahraini S, Keshavarzi Z, Firoozabadi A, Alavi, et al
Nutrigenomics Nutribiometics represents an emerging integrative paradigm in precision health that synthesises genomic, metabolomic, microbiomic, and pharmacogenomic data better to understand inter-individual variability in nutrition and therapeutic response
Rotating injection sites helps prevent lipohypertrophy (tissue buildup) and ensures consistent absorption
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