Sixth grader’s science project documents Truvia™ as potential insecticide

Erythritol is the major ingredient in the artificial sweetener Truvia™.  In an article released by Drexel University on  June 4, 2014, it was revealed that scientists at Rutgers University have discovered that Truvia results in early death and significant motor impairment of fruit flies.  The announcement of the study was  titled You can catch (and kill) more flies with this sweetener.

Sean O’Donnell, PhD, a professor of biology and biodiversity, earth and environmental science in Drexel’s College of Arts and Sciences, was a senior author of the paper.   O’Donnell had this to say regarding the experiment.


Erythritol, the main component of the sweetener Truvia®, was toxic to Drosophila melanogaster fruit flies in a dose-dependent manner in the Drexel team’s study, published in PLOS ONE. The flies consumed erythritol when sugar was available and even seemed to prefer it. No other sweeteners tested had these toxic effects. –

The major ingredient in Truvia is erythritol, a sugar alcohol.  The other ingredient is stevia, and stevia had no impact on the life or motor functions of the fruit flies.

This discovery was started by a sixth grade science project by Simon Kaschock-Marenda, who is now in the ninth grade at the time this article was written.  Kaschock-Marenda is listed as a co-author of the paper.  Kaschock-Marenda was curious that his parents had switched from sugar to sweeteners.  He asked his father, Dr. Daniel Marenda, who teaches biology at Drexel’s College of Arts and Sciences if could do an experiment of the effects of sugar as a science fair project.

Kaschock-Marenda and Marenda bought several  sugar substitutes and types of sugar and set up an experiment using fruit flies.  After a few days .  Kaschock-Marenda reported to his father that all of the fruit flies that had consumed Truvia were dead.   Marenda insisted that his son repeat his experiment with Truvia in one of Drexel’s laboratories under controlled conditions.  The fruit flies still died.

One of the conclusions from the report quoted this impact on the fruit flies from erythritol versus other sweeteners.

Flies raised on food containing Truvia® lived for only 5.8 days on average, compared to 38.6 to 50.6 days for flies raised on control and experimental foods without Truvia®.   Flies raised on food containing Truvia® also showed noticeable motor impairments prior to their deaths.

“Indeed what we found is that the main component of Truvia®, the sugar erythritol, appears to have pretty potent insecticidal activity in our flies,” Marenda said.

– See more at:


The research team is seeking a patent on the use of erythritol as an insecticide.  Their claim is based upon their research results.  Erythritol is approved as a food additive and the FDA found no problems when erythritol was supplied to humans.

Based upon the original science fair project, erythritol caused motor impairment in the fruit flies.  This might lead to a cautionary approach in applying it as an insecticide and initiate continued studies of the long-term effects of erythritol on the human nervous system.

At this point, pure stevia appears to be the safest alternative sweetener.  There are major concerns about the breakdown product of aspartame (Equal™)  and sucralose (Splenda™).  This report on Truvia™ does not lead to additional confidence as a food additive if you consider that fruit flies are widely used in neurological research.  The motor function impairment is a potentially serious issue.

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