Food Additive Found in Candy, Gum Could Alter Nutrient Absorption

by Julia Samuel on  February 17, 2017 at 12:59 PM Health Watch
RSS Email Print This Page Comment
Font : A-A+

Highlights
  • Titanium dioxide is a common food additive that is generally recognized as safe by the U.S. Food and Drug Administration.
  • Consuming titanium for 5 days in all 3 meals can reduce the capacity of the small intestine to absorb iron, zinc and fatty acids.
  • To avoid ingesting the additive, restrict the use of processed foods and candy.
Small intestine plays an important role in nutrient absorption and act as a barrier to pathogens. But this ability is decreased after chronic exposure to nanoparticles of titanium dioxide.
Food Additive Found in Candy, Gum Could Alter Nutrient Absorption
Food Additive Found in Candy, Gum Could Alter Nutrient Absorption

Researchers at the Binghamton University, State University of New Yorkexposed a small intestinal cell culture model to the physiological equivalent of a meal's worth of titanium oxide nanoparticles--30 nanometers across--over four hours (acute exposure), or three meal's worth over five days (chronic exposure).

Acute exposures did not have much effect, but chronic exposure diminished the absorptive projections on the surface of intestinal cells called microvilli. With fewer microvilli, the intestinal barrier was weakened, metabolism slowed and some nutrients--iron, zinc, and fatty acids, specifically--were more difficult to absorb. Enzyme functions were negatively affected, while inflammation signals increased.

"Titanium oxide is a common food additive and people have been eating a lot of it for a long time--don't worry, it won't kill you!--but we were interested in some of the subtle effects, and we think people should know about them," said Professor Gretchen Mahler, Biomedical Engineering Assistant , one of the authors of the paper.

"There has been previous work on how titanium oxide nanoparticles affects microvilli, but we are looking at much lower concentrations," Mahler said. "We also extended previous work to show that these nanoparticles alter intestinal function."

Titanium dioxide is generally recognized as safe by the U.S. Food and Drug Administration, and ingestion is nearly unavoidable. The compound is an inert and insoluble material that is commonly used for white pigmentation in paints, paper and plastics. It is also an active ingredient in mineral-based sunscreens for pigmentation to block ultraviolet light.

However, it can enter the digestive system through toothpastes, as titanium dioxide is used to create abrasion needed for cleaning. The oxide is also used in some chocolate to give it a smooth texture; in donuts to provide color; and in skimmed milks for a brighter, more opaque appearance which makes the milk more palatable.

A 2012 Arizona State University study tested 89 common food products including gum, Twinkies, and mayonnaise and found that they all contained titanium dioxide. About five percent of products in that study contained titanium dioxide as nanoparticles. Dunkin Donuts stopped using powdered sugar with titanium dioxide nanoparticles in 2015 in response to pressure from the advocacy group As You Sow.

"To avoid foods rich in titanium oxide nanoparticles you should avoid processed foods, and especially candy. That is where you see a lot of nanoparticles," Mahler said.

Reference
  1. Zhongyuan Guo et al., Titanium dioxide nanoparticle ingestion alters nutrient absorption in an in vitro model of the small intestine, Nanoimpact (2017) http://dx.doi.org/10.1016/j.impact.2017.01.002.


Source: Medindia

Post a Comment

Comments should be on the topic and should not be abusive. The editorial team reserves the right to review and moderate the comments posted on the site.
Notify me when reply is posted
I agree to the terms and conditions

Related Links

More News on:

Small Intestine Biopsy Tooth Decay Gum Recession Swollen Gums Tooth Discoloration Nervous Tic Why Do We Eat - Nutrition Facts Diet Lifestyle and Heart Disease Hunger Fullness and Weight Control Label Lingo on Food Items: Decoded 

News A - Z

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

News Search

Medindia Newsletters

Subscribe to our Free Newsletters!

Terms & Conditions and Privacy Policy.

Advertisement
Advertisement

Stay Connected

  • Available on the Android Market
  • Available on the App Store

Facebook

News Category

News Archive