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For one, you may experience mild side effects during your treatment, such as tenderness at the injection site and a mild headache

Although dairy and meat products are usually considered good food sources of vitamin B12, the actual B12 levels contained in these products tend to vary greatly, as livestock is regularly supplemented with B12 injections to avoid deficiencies, making for a less than reliable (and natural!) source

Data indicate that a single injection typically maintains therapeutic levels for approximately one week [25]

Practitioners should consider specific B 12 dietary counselling for patients currently on a vegetarian, or vegan diet, including patients who have recently initiated such a diet