Can I take Magnesium and Vitamin b complex together?
Drug interaction guide
Originally published 25 Jan 2026
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There is no known harmful interaction between magnesium and Vitamin B complex. In fact, these two supplements are often taken together because they work well as a team in the body.
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Why this happens
Magnesium and B vitamins (especially Vitamin B6) have a synergistic relationship. Vitamin B6 helps the body absorb magnesium more efficiently into the cells where it is needed. They do not compete for absorption or interfere with how the other is processed by the liver or kidneys.
What you should do
It is safe to take these together. For the best absorption, you can take them with a meal. Always stick to the recommended daily dose on the packaging, as taking very high doses of magnesium can sometimes cause diarrhoea or stomach upset.
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Using other medicines
Taking 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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Article history
The information on this page is written and peer reviewed by qualified clinicians.
25 Jan 2026 | Originally published
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