B12 and folate are both required for DNA methylation and red blood cell formation. Supplementing folate alone can mask B12 deficiency by correcting anemia while allowing neurological damage to progress — always co-supplement.
Recommendation
When taking folate (especially >400mcg), always include 500-1000mcg B12. Prefer methylfolate + methylcobalamin for MTHFR variants.
Timing
Can take together
Sources
— NIH Office of Dietary Supplements
— PMID: 18174293
Frequently Asked Questions
Can I take folate and vitamin b12 together?
B12 and folate work together in methylation. When taking folate (especially >400mcg), always include 500-1000mcg B12. Prefer methylfolate + methylcobalamin for MTHFR variants.
How should I time folate and vitamin b12?
Can take together
Is this interaction dangerous?
This interaction is rated “Synergy” by Formulate. B12 and folate are both required for DNA methylation and red blood cell formation. Supplementing folate alone can mask B12 deficiency by correcting anemia while allowing neurological damage to progress — always co-supplement.
Want to check your whole stack?
The free checker lets you add any combination of supplements and medications at once. Formulate's desktop app goes further — every stack change surfaces interaction alerts automatically.