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Can I take Adcal d3 and Magnesium glycinate together?

Drug interaction guide

Taking calcium (in Adcal-D3) and magnesium together can cause them to compete for absorption in your body. This means you might not get the full benefit of either supplement. Additionally, taking high doses of both can occasionally lead to an upset stomach or a laxative effect.

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Why this happens

Calcium and magnesium use the same 'pathways' to be absorbed from your gut into your bloodstream. If taken at the exact same time in large amounts, they can crowd each other out. Furthermore, both minerals can draw water into the bowel, which may cause loose stools.

It is best to space these supplements out. Try to take your Adcal-D3 and your magnesium glycinate at least 2 hours apart to ensure your body absorbs as much of each mineral as possible. If you experience any diarrhoea or stomach cramping, speak with your pharmacist about adjusting the timing or dose.

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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.

  • 14 Mar 2026 | Originally published
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