If you're deficient, correcting it produces a noticeable sometimes dramatic improvement in energy, stamina, and mental clarity
[1] If during injection a patient experiences chest pain, difficulty breathing, hives, or swelling of the face or throat, it could indicate anaphylactic shock
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The injection itself takes less than five minutes
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
However, it is not MHRA-approved and cannot be used for human consumption, therapeutic use or medical application