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This is the main factor for how long a B12 injection takes to work, offering a significant advantage over oral supplements, which must be broken down by the digestive system before they can be distributed throughout the body
For cardiovascular health specifically, Canadians have well-established conventional options through the healthcare system
Not every athlete has the same needs for any nutrient, including vitamin B12
If symptoms do not begin to clear after 5 minutes, give a second injection if one is available
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