vitamin b12 tablet or injection which is better The Advantages of Injections Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine Vitamin B12 Injections vs. Oral
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The body excretes any excess through urine, so there are minimal side effects, even at high doses

Alcohol can also make it harder and longer to recover from surgery

If you have dietary restrictions, digestive problems, or medical conditions that make it hard to absorb B12 through food or pills, these injections can be a game-changer

This occurs through multiple mechanisms
