Are there any side-effects or precautions when taking Active B12 with L-5-MTHF?

The most common side-effects of B12 supplements are rash, itching, mild fever, and sometimes stomach upset. Individuals who have recently undergone surgery for a coronary stent should avoid using B12. Methylfolate side effects may include gastrointestinal complaints, insomnia, irritability, and fatigue. If you believe that you are experiencing any adverse reactions, please see your healthcare professional immediately. Each individual may react differently to any product or supplement. We always recommend that you consult with your healthcare professional prior to considering the use of Active B12 with L-5-MTHF or any supplement.*