Folate (B9) vs Vitamin B12 — Which Should You Take?
Folate and B12 work together in DNA synthesis and red blood cell production. Deficiency in either causes megaloblastic anaemia. B12 deficiency can mask folate deficiency. Test both if fatigued.
Quick Verdict
Both essential for DNA synthesis — deficiency in either causes anaemia
Folate (B9) Benefits
Vitamin B12 Benefits
Folate (B9) Side Effects
Vitamin B12 Side Effects
Can You Take Folate (B9) and Vitamin B12 Together?
In most cases, Folate (B9) and Vitamin B12 can be taken together safely. However, always check the interactions section of each supplement and consult a healthcare professional if you take medication or have existing health conditions.
Folate (B9): Anticonvulsant medications (phenytoin, phenobarbitone) reduce folate absorption
Folate (B9): Methotrexate antagonises folate metabolism
Vitamin B12: Metformin reduces B12 absorption — supplement if on metformin
Vitamin B12: Proton pump inhibitors (PPIs) reduce absorption
Which Should You Choose?
Both essential for DNA synthesis — deficiency in either causes anaemia. Many people take both as they target different aspects of health. The best choice depends on your individual needs, existing diet, and health goals. If in doubt, start with one, assess for 4-8 weeks, then consider adding the other.
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Frequently Asked Questions
Is Folate (B9) better than Vitamin B12?
Both essential for DNA synthesis — deficiency in either causes anaemia
Can I take Folate (B9) and Vitamin B12 together?
In most cases, yes. Folate (B9) and Vitamin B12 can be taken together safely. However, always check for specific interactions and consult a healthcare professional if you take medication.
What is the best time to take Folate (B9)?
With food, preferably at breakfast
What is the best time to take Vitamin B12?
Morning — may be energising
What are the side effects of Folate (B9)?
Nausea or gastrointestinal upset (typically at high doses). Headaches or fatigue. Potential B12 deficiency masking with excessive supplementation.
What are the side effects of Vitamin B12?
Very safe — excess excreted in urine. Rare: acne at very high doses in some individuals.
How We Compare Supplements
This comparison is based on published clinical research, peer-reviewed studies from PubMed, and established nutritional science. We evaluate dosages based on clinically-effective amounts, not manufacturer recommendations. Benefits listed have at least moderate evidence from human studies. When evidence is limited or conflicting, we note this.