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The injection delivers B12 directly into the bloodstream, making it the most reliable method for patients with absorption problems, pernicious anaemia, or gastrointestinal conditions affecting B12 uptake (such as Crohn's disease, coeliac disease, or following gastric surgery)
These quality parameters are especially relevant in studies where inflammatory signaling or immune interference must be carefully controlled
D., Xu, J., & Zhang, Y
The only practical difference is how precise your syringe reading is
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