does a b12 injection break your fast Vitamin Side Effects and Safety Understanding the B12 Vitamin Shot:

I also liked that my injector was really knowledgeable and conservative where needed

Compared to other types, IM needles are usually longer and thicker

Recommended testing schedule Baseline (before starting): Complete metabolic panel, CBC, lipid panel, HbA1c (even if not diabetic), B12, folate, vitamin D, thyroid panel, and fasting insulin

However, the B12 itself can stay in your system longer, with effects on red blood cell production and nerve health lasting for weeks or months, depending on your deficiency and injection frequency

The primary efficacy assessment included weight loss at 12 weeks

The 12-week trial showing 2.6 kg fat loss versus 0.8 kg placebo was run at 1 mg/day