how often can i have a vitamin b12 injection B12: Frequently Should Get It? B12 Shots: Benefits, Uses, Safety,

CDC summarizes that guidance directly in its injection safety recommendations: "Once a multi-dose vial is opened (e.g., needle-punctured) the vial should be dated and discarded within 28 days unless the manufacturer states another date for that opened vial

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This helps prevent muscle loss that often accompanies aging

That means not just feeling good, but looking good

Medical professionals and researchers are not clear if the allergic reaction is caused by the preservatives or other substances found in the injection solution or the vitamin itself

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