The new research was led by Robert Beelman, professor emeritus of food science and director of the Pennsylvania State University Center for Plant and Mushroom Products for Health in State College. Michael D. Kalaras, a postdoctoral assistant in food science, is the first author of the paper.
Researchers were already aware that mushrooms are “the highest source” of an antioxidant called ergothioneine, but little was known about glutathione, another major antioxidant.
Additionally, levels of antioxidants vary across different species of mushroom, so the researchers wanted to know which species had the most of these two chemicals.
The new findings are significant in the context of the so-called free radical theory of aging. As Prof. Beelman explains, “[The theory] has been around for a long time [and it] says when we oxidize our food to produce energy there’s a number of free radicals that are produced that are side products of that action and many of these are quite toxic.”
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