Glutathione has many functions within the body including, supporting immune function, forming sperm cells, fighting free radicals, helping with certain enzyme functions, and making DNA
If you have a methylation issue then you will want to use methylcobalamin
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Those on Certain Medications : Some medications, such as metformin (for diabetes) or proton pump inhibitors (for acid reflux), can interfere with B12 absorption
Taking more than this can cause problems. In short, knowing the facts about B12 and iron supplements helps make better health choices