847K views · 9.7K reactions | “Folic acid is the synthetic form of vitamin B9, but many people can’t convert it into the active form (methylfolate). When it builds up unmetabolized, it can block the receptors and actually interfere with your body’s ability to use real folate. That’s why it’s better to avoid folic acid in fortified foods/supplements and get methylfolate or natural folate from leafy greens instead | Perfect Health | Facebook