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
Ages 20-50 are especially critical as this is when we can still restore that coveted glass-skin finish
Step 1: Choose a Liposomal Format As we have discussed, bioavailability is the most important factor
10.1016/j.it.2011.06.011 70 McGannP
it is simply what happens when your internal filtration system is working properly