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Because injections skip this step, the absorption rate of B12 is significantly higher and more predictable than oral supplements
Bioavailabilit y: Oral B12 supplements require intrinsic factor, a protein in the stomach, for absorption
Can I get enough folic acid from food alone
It is only found in animal foods such as red meat, liver, fish and dairy products
If you're low in vitamin B12 and receive an injection, your body might react to the sudden boost with a headache, nausea, or dizziness
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