b12 injections pernicious anemia and Deficiency Pernicious Anemia Treatment Guidelines: Don't

When deficiency is suspected based on clinical features (fatigue, paraesthesia, cognitive changes) or risk factors (vegan diet, gastric surgery, certain medications), serum B12 measurement guides appropriate intervention

Thus, a person who got a bariatric surgery such as gastric bypass surgery, and developed a B12 deficiency, can suffer from depression symptoms

The exact frequency will depend on how your body responds to the treatment and the underlying cause of your deficiency

Mild reactions may resolve by discontinuing supplements, while severe symptoms may require medical intervention, such as supportive care or medication