My WebMD Sign In, Sign Up

Ask Your Question

WebMD Answers

120 Characters remaining
120 Characters remaining
  • First, try and keep your question as short as possible.
  • Include specific words that will help us identify questions that may already have your answer.
  • If you don't find your answer, you can post your question to WebMD Experts and Contributors.


Posted: | Report This Report Question |

How long can I take a multi vitamin and it remain effective?

Related Topics: Multivitamin, Vitamin

Answers From Experts & Organizations (1)

405 Answers
10,381 Helpful Votes

While it's impossible to say exactly how long a multivitamin is effective, understanding how different vitamins are absorbed and stored in the body can give you some idea.  Generally, water soluble vitamins (B vitamins and vitamin C)  aren't stored in the body.  Instead, they are absorbed based on need with the remaining excesses being excreted in the urine.  This is why it's important to get these vitamins on a regular basis.  On the other hand, fat soluble vitamins (A, D, E and K) need fat present to be absorbed and are stored in the body for later use (fat tissue and liver). 


So basically, some of the vitamins are excreted daily while others are stored.  For more on the difference between fat and water soluble vitamins, see this WebMD article

This answer should not be considered medical advice...down arrowThis answer should not be considered medical advice and should not take the place of a doctor’s visit. Please see the bottom of the page for more information or visit our Terms and Conditions.up arrow

| Report This Report Answer

Was this helpful?


Thanks for your feedback.

107 of 121 found this helpful