common side effects to injectable b12 Are Injections Safe? & Risks Explained B12 Shots Side Effects And

Folate Deficiency Anemia D52 Series Folate deficiency causes the same type of megaloblastic anemia as B12 deficiency

The risk of renal adverse reactions was increased in patients with a history of renal impairment (the weight management trials included 65 patients with a history of moderate or severe renal impairment at baseline), and occurred more frequently during dose titration

Symptoms could include itching, hives, difficulty breathing, or swelling of the face/lips/tongue

He has not heard of this as a side effect

Certain subgroups may be more likely to respond to treatment, including those with lower methionine levels and/or lower GSH redox status