A test is useful to confirm deficiency, but its not always required before starting a private B12 injection course
Gastric bypass surgery can reduce the stomachs ability to produce intrinsic factor, a protein needed for B12 absorption
Reduced insulin sensitivity, with increases in fasting blood glucose and HbA1c relative to placebo over 12 months in the same controlled trial, a concern for anyone with existing metabolic risk
But it's one tool
Rasoul Montazeri, DO, a triple board-certified physician in preventive medicine, obesity medicine, and longevity, and CEO and founder of Healthon of Irvine, California, lipotropic means the breakdown of fat
How to Minimise the Risk of Side Effects To reduce the risk of side effects, ensure that: The injections are performed by an experienced professional