Addition of an Euglena extract to milk in a test tube, followed by incubation at a constant temperature, facilitated milk solidification into yogurt. Furthermore, pH monitoring showed that acidification of milk was accelerated by the addition of the Euglena extract. These results suggest that the addition of Euglena extract facilitates the production of lactic acid by lactic acid bacteria.
Twenty-eight people (40–60-year-old) ingested 2 g of an Euglena powder daily. Consequently, the daily stool output, which is calculated based on the frequency of defecation per day and the mean amount of each defecation, increased, implying that Euglena may contribute to the relief of constipation.