Do certain vitamins interact with other vitamins?

There are definitely instances where status of one vitamin can affect the status of another. There are also food, mineral and medicinal interactions that can affect nutrient absorption.

I suspect your question concerns the intake of vitamins at the same time, most likely from a supplemental form. A properly designed multiple vitamin/mineral formula (MVM) will have a variety of nutrients, while all ingested at the same time, should allow the release to occur slowly over several hours, negating interference or competitive absorption. Taking your MVM with a meal will help to slow the release and prolong the exposure to nutrients and further minimize any potential interactions.

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