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Individuals who have had gastrointestinal surgery, such as weight loss surgery, may also have fewer cells through which to secrete stomach acid and intrinsic factor, inhibiting B12 absorption
As your B12 levels rise, your cells receive more oxygen: and you feel more alert and energised
If you're anemic or vegetarian, your iron might not be the only thing that's low
Localized redness or irritation may occur at the subcutaneous injection site
Sperry, J., & Brse, S
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