Can Folic Acid Block Folate Recycling and Access to the Brain

So you could be eating the spinach, the broccoli, and the lentils, and the liver every single day. You could be doing everything right, but if you're also consuming folic acid from enriched bread, enriched pasta, or supplements,

your kidneys cannot efficiently save the methylfolate from your own diet. Let that sink in. Your brain can't access folate because folic acid blocks entry at the blood-brain barrier.

Your kidneys can't save folate because folic acid blocks the recycling system. So you end up folate deficient even though you're consuming natural folates every single day.