b12 injection or tablets The Advantages of Injections Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine B12 Injections vs. Oral Supplements:
Description
After a bariatric surgery like the gastric bypass, the digestive tract changes forever, unless the patient reverses their gastric bypass surgeryan unlikely scenario

Digestive issues may further reduce the effectiveness

doi: 10.1177/0310057X1604400410
In contrast, IM injections can be painful, and are more error-prone than injecting into fat
