side effects of not having b12 injection Shots at Home: How, Where & How Often to Inject Yourself Symptoms of Vitamin B12 Deficiency.

Not a peptide

If you think a B12 shot will give you more stamina, help you lose weight, or make nodding off a bit easier at nightwell, you might be right

In addition, those who take certain medications may be at increased risk for B12 deficiency, per Healthline

While its unlikely that your animals can overdose on B12, a blood test or other diagnostic tests used by veterinarians can help rule out other issues that may cause symptoms instead

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When used with epinephrine the dose should not exceed 7mg/kg (3.5 mg/lb) of body weight