reaction to vitamin b12 injection Shots: B12 Injections Benefits, Uses, Risks Vitamin B12 Injection | Causes
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They can also provide guidance on the frequency and dosage of these injections

Because the body is efficient at excreting excess B12 through urine, there is no established tolerable upper intake level (UL) for the vitamin

Neuroscience 252, 302319

It's not a magic bullet, but it's thought to give your liver a bit of extra support
