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  • Writer's pictureUVSU Nutrition

Vitamins: The Dos and Don'ts of Combining Nutrients



Vitamins are a crucial part of our diet, helping to maintain good health and preventing disease. However, taking the wrong combination of vitamins can lead to negative interactions and side effects. In this post, we'll guide you through the dos and don'ts of combining vitamins to make sure you're getting the most benefit for your health.



When taking vitamins, it's important to avoid toxicity. High doses of Vitamin A and Vitamin D can lead to toxicity when taken together. Similarly, taking Vitamin E and Vitamin K together can interfere with the absorption of both vitamins.


Another combination to watch out for is Vitamin C and Iron. Taking these vitamins together can cause stomach upset and diarrhea. To avoid this, iron supplements should be taken with food, and


Vitamin C should be taken at least two hours before or after consuming iron.


Vitamin B6 and Vitamin B12 should also be taken separately. Taking these two vitamins together can decrease the effectiveness of Vitamin B6, and high doses of Vitamin B6 can even cause nerve damage.


Medications can also interact with vitamins, so it's important to speak with a healthcare professional before starting any supplement regimen. For instance, blood-thinning medications like warfarin can interact with Vitamin K and affect blood clotting. Vitamin E can increase the risk of bleeding when taken with blood-thinning medications like warfarin and aspirin. Vitamin C can decrease the effectiveness of antibiotics and blood pressure medications when taken together. Vitamin B3, also known as niacin, can increase the risk of side effects when taken with statins and fibrates. Vitamin B12 absorption can be affected by proton pump inhibitors.


When Taking Vitamins, Remember:

  • Always consult with a healthcare professional before taking any vitamin supplements, especially if you're already taking other medications

  • Avoid taking Vitamin A and Vitamin D together

  • Avoid taking Vitamin E and Vitamin K together

  • Avoid taking Vitamin C and iron together

  • Avoid taking Vitamin B6 and Vitamin B12 together

  • Be mindful of the potential interactions between vitamins and medications

By following these tips, you can make the most of your vitamin supplements without worrying about negative side effects. Your health should always be your top priority, and it's better to be safe than sorry!



Our team members are always available to assist you with any questions or concerns. Please do not hesitate to contact us for further information and assistance. Additionally, to learn more about our services, we invite you to visit our website and discover what we offer.



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