Save 30% on your first subscription order using code: EZ30

What Vitamin Supplements Should Not Be Taken Together?

Reading Time: 3 minutes

Vitamin and health supplements are everywhere these days, and their popularity is only rising. With so many options, and so many vitamins and minerals to keep track of, it can be hard to choose. Often, people just guess what they should take and end up overdoing it. 

While vitamin supplements are a great, easy way to support your wellness, remember that taking too many vitamins can be harmful to our bodies. 

Some vitamins can interact with each other, and large doses of certain minerals can lead to undesirable consequences, or at best, they’ll be ineffective. In this blog post, we will be discussing the vitamin supplements that should not be taken together at the same time. 

Calcium and Iron

Calcium and iron are essential minerals that perform different bodily functions. Iron is needed to produce red blood cells while calcium is essential for strong bones. 

Taking these two minerals together can interfere with the absorption of both nutrients. Calcium can prevent iron absorption, while iron can inhibit calcium absorption.

Vitamin C and Vitamin B12

Vitamin C is an antioxidant that boosts the immune system, while vitamin B12 is essential for the healthy functioning of the brain and nervous system. 

However, these two vitamins should not be taken together as vitamin C interferes with the absorption of vitamin B12. This can lead to a deficiency of vitamin B12, which can result in serious health problems.

Zinc, Calcium, and Magnesium

Calcium, zinc, and magnesium are all essential minerals for your health. However, if taken all together at once, calcium can cause other minerals to be less absorbed, leading to poor results. 

Vitamin E and Blood Thinners

Vitamin E is an antioxidant that supports healthy skin and is important for the immune system. However, taking this vitamin with blood thinners can lead to an increased risk of bleeding. Vitamin E can prevent blood from clotting, which can be dangerous for those taking blood thinners.

Vitamin A and Vitamin K

Vitamin A is essential for vision health and a healthy immune system, while vitamin K helps with blood clotting. However, taking these two vitamins together can interfere with the absorption of vitamin K. In excessive amounts, vitamin A can also interfere with vitamin K's ability to promote healthy blood clotting.

Vitamin B6 and Zinc

Another pair of vitamins you shouldn't take together is vitamin B6 and zinc. While both of these nutrients are important for a healthy immune system, taking them together can lead to reduced zinc absorption. This can result in a deficiency of zinc, which is essential for wound healing and proper immune function.


While vitamins and minerals are essential for our bodies' functioning, it's important to take them in moderation. Taking too many vitamins or combining certain vitamins can interfere with the absorption and cause undesirable consequences. Most of these aren't harmful interactions, but taking any of these combinations at the same time may reduce their efficacy. 

It is always best to consult with a healthcare provider before starting any new vitamin regimen to ensure that you are taking the correct vitamins in the correct dosage. Remember, moderation is key to achieving optimal health.