Q. I take a multivitamin after breakfast. I notice that my urine turns bright yellow for several hours afterwards. What causes this change in color and is it dangerous?

A. Riboflavin (vitamin B2) can color urine an almost fluorescent yellow. It is not dangerous.

The bigger question is whether you need to take a multivitamin. This has become quite controversial, with several studies suggesting that vitamin supplements are not associated with a reduced risk of heart disease over the long term (Journal of the American Medical Association, Nov. 7, 2012). It appears, however, that a multivitamin may modestly lower the risk of cancer in men (Journal of the American Medical Association, online Oct. 17, 2012).

If you’d like to learn more about the arguments for and against vitamin supplements, you may want to listen to our radio show #876, The Great Vitamin Debate.

Get The Graedons' Favorite Home Remedies Health Guide for FREE

Join our daily email newsletter with breaking health news, prescription drug information, home remedies AND you'll get a copy of our brand new full-length health guide — for FREE!

What Do You Think?

We invite you to share your thoughts with others, but remember that our comment section is a public forum. Please do not use your full first and last name if you want to keep details of your medical history anonymous. A first name and last initial or a pseudonym is acceptable. Advice from other commenters on this website is not a substitute for medical attention. Do not stop any medicine without checking with the prescriber. Stopping medication suddenly could result in serious harm. We expect comments to be civil in tone and language. By commenting, you agree to abide by our commenting policy and website terms & conditions. Comments that do not follow these policies will not be posted.

Your cart

Total
USD
Shipping and discount codes are added at checkout.