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Can I take Joint assurance and Vitamin d3 1000 together?

Drug interaction guide

Taking Joint Assurance alongside Vitamin D3 1000 may lead to you consuming more Vitamin D than you realise. Joint Assurance often contains Vitamin D as part of its 'bone health' formula. While Vitamin D is essential, taking too much over a long period can lead to high calcium levels in your blood.

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Why this happens

Both products contain Vitamin D (Cholecalciferol). This is an additive interaction where the total daily dose is the sum of the Vitamin D in the Joint Assurance supplement plus the 1000 IU from your separate Vitamin D3 tablet.

What you should do

Check the 'Nutritional Information' label on your Joint Assurance bottle. If it already contains 1000 IU (25mcg) or more of Vitamin D, you likely do not need the extra supplement unless specifically told to take it by your doctor. If the Joint Assurance contains a small amount (e.g., 200-400 IU), taking both is generally safe for most adults. If you are unsure of the total dose, ask a pharmacist to check the labels for you.

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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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