Causes and Symptoms of B12 Deficiency Deficiency can arise from: Poor dietary intake Malabsorption issues (e.g., pernicious anemia, atrophic gastritis) Gastrointestinal surgeries or disorders (e.g., Crohns disease) Certain medications affecting stomach acid or absorption Symptoms of deficiency include fatigue, weakness, numbness or tingling in hands and feet, memory difficulties, mood changes, and in severe cases, neurological damage
PMID 25945462
Your body might not be absorbing the vitamin at a steady rate when you are taking supplements, and thats where a Vitamin B12 shot can help accelerate the process
Iso Peps does not provide instructions for human injection, administration or personal reconstitution
Most vitamin b12 injections you will handle in a UK clinic are therefore 1mg/1ml hydroxocobalamin ampoules, supplied ready to use with no reconstitution required
Yang HL et al