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It consists of sterile water for injection combined with 0.9% benzyl alcohol, which acts as a preservative to inhibit microbial growth after vial access
This retention advantage may explain why some patients feel more prolonged effects from methylcobalamin even if blood levels look similar
Langmuir (2019) 35:415260
Do you feel more energetic
If you don't eat animal products, or you have a medical condition that limits how well your body absorbs nutrients, you can take vitamin B12 in a supplement or eat plant-based foods fortified with B12