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The exact frequency depends on your individual needs, current B12 levels, and lifestyle factors
Vomiting: Median duration of 2 days per episode, representing the shortest-lived common side effect
These antibodies help the body recognize and fight off the actual disease if a person is exposed to it later on Do intramuscular injections hurt
Vegans, vegetarians, older adults, people with digestive problems, and those on certain long-term medications
Bear in mind that only white women ages 55 to 69 were enrolled in the study and they were followed for 22 years
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