after my second injection of b12 i felt better Why do feel worse a injection? Seeing Red: Do B12 Injections
Description
Usually, its 100 mg thiamine and 1,000 mcg B12

doi: 10.1523/JNEUROSCI.0984-06.2006

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Suitability depends on individual medical circumstances and should be assessed by a qualified healthcare professional

Vitamin B1

But for some people, B12 can cause gastrointestinal disruption that lands you in the bathroom
