Can I take Vitamin B12 and Vitamin D together?
Drug interaction guide
Originally published 25 Jan 2026
Meets Patient’s editorial guidelines
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There is no known negative interaction between Vitamin B12 and Vitamin D. In fact, they are often taken together to support overall health.
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Why this happens
These two vitamins are processed by the body through different pathways. Vitamin B12 is a water-soluble vitamin absorbed mainly in the small intestine with the help of a protein called intrinsic factor. Vitamin D is a fat-soluble vitamin that requires dietary fat for absorption. They do not compete for absorption or interfere with how the other is broken down or used by the body.
What you should do
Back to contentsIt is safe to take Vitamin B12 and Vitamin D at the same time. You do not need to space them apart. For best results, Vitamin D should be taken with a meal containing some fat (like yoghurt, eggs, or avocado) to help your body absorb it properly. Always follow the dosage instructions on the label or those provided by your healthcare professional.
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Important precautions
Back to contentsHypercalcaemia (high blood calcium)
Do not take vitamin D if you have high levels of calcium in your blood or urine, as it can lead to serious complications including kidney damage and heart rhythm issues.
Food and drink warnings
Back to contentsAlcohol
It is best to avoid or strictly limit alcohol while taking Vitamin B12. Regular or heavy alcohol consumption can interfere with the body's ability to absorb Vitamin B12 from the gut, making the supplement less effective.
High-fat meals
Vitamin D is a fat-soluble vitamin. It is best absorbed by your body when taken with a meal that contains some fat (such as eggs, avocado, nuts, or dairy).
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Using other medicines
Back to contentsTaking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Disclaimer
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
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Treatment and medication
Can I take Atorvastatin and Prednisolone together?
Taking atorvastatin and prednisolone together may increase the risk of muscle-related side effects, such as muscle pain, tenderness, or weakness. In rare cases, this can lead to a serious condition called rhabdomyolysis, where muscle tissue breaks down and can cause kidney damage. Additionally, prednisolone can raise blood sugar levels, which may slightly reduce the effectiveness of atorvastatin in managing your cholesterol profile.
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Article history
The information on this page is written and peer reviewed by qualified clinicians.
25 Jan 2026 | Originally published
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