Substituting one form for another should only happen with professional guidance
A.SavoviJ.PageM
Animal-based foods: Clams, sardines, beef liver, tuna, salmon, dairy, and eggs, are highest
B12 injections are key for people with certain health issues
The correct approach: Test serum B12, MMA, and homocysteine not just serum B12 Use the functional cutoff of 500 pg/mL for optimal status, not the labs lower limit of 200 pg/mL Identify the cause diet, malabsorption, medication, or autoimmune Match the supplementation protocol to the cause and severity Retest to confirm response, and continue monitoring if the underlying cause persists If youre over 50, vegan, taking metformin or PPIs, or experiencing unexplained fatigue, brain fog, or neuropathy get tested
Since 1mg = 1000 micrograms (mcg), this is also 100mcg per unit