Better to eat kiwifruit than to take vitamin C supplements

(Medical Xpress) -- University of Otago, Christchurch, researchers have found that a natural fruit source of vitamin C – kiwifruit – is vastly superior to a purified supplement form.

The researchers are studying kiwifruit as a source of dietary vitamin C and found that in mice eating kiwifruit, vitamin C uptake was five times as effective as taking a purified supplement form.

The study was recently published in the American Journal of Clinical Nutrition, the highest ranking journal for human nutrition research.

Lead researcher Associate Professor Margreet Vissers says people require vitamin C (ascorbate) in all body tissues and organs to be healthy. Our bodies cannot make the vitamin and we should obtain it from our food. It is also available in purified form and is arguably the most commonly consumed vitamin supplement.

In the experiment vitamin C-deficient mice were fed the vitamin over a month, either as kiwifruit or as an equivalent amount of pure vitamin C.

Mice fed the absorbed vitamin C much more efficiently than those given the purified supplement form, and they also retained it for longer. This suggests that there is something in the fruit that improves absorption and retention.

Vissers says: “The findings of the mouse trial have important implications for human nutrition”.

To determine whether this situation also applies to people would require a human trial and an equivalent human study is now underway.

“The question that has often been asked is whether a supplement is as good a source of as whole foods, but few studies have addressed this issue. We are uniquely placed to do that work.’’

The mouse study was funded by Zespri and the University of Otago.


Explore further

Are we getting enough vitamin D?

Provided by University of Otago
Citation: Better to eat kiwifruit than to take vitamin C supplements (2011, May 27) retrieved 15 January 2021 from https://medicalxpress.com/news/2011-05-kiwifruit-vitamin-supplements.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
 shares

Feedback to editors

User comments