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Athletes may be using these substances in the belief that they will give them an edge, although how common these illicit practices are is unknown, as they are shrouded in secrecy
people at higher risk of deficiency include older adults, those with gastrointestinal issues that impair absorption, people whove had gastric surgery, long-term strict vegans who do not supplement, and those on certain acid-reducing medicines
If the needle is too short, the medication may not reach the muscle tissue, resulting in reduced effectiveness
Table of Contents: How long do the effects of a Vitamin B12 injection last
Evidence comparing these different routes of supplementation show them to be equally effective so people can choose whichever they find most convenient.
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