"What we found is that, without a doubt, mushrooms are the highest dietary source of these two antioxidants taken together, and that some types are really packed with both of them," said Beelman. But as they zoom around your body looking for other single electrons to pair with they can do a lot of damage to your cells, which is why the term has become a buzzy one for scaring you into buying skincare products (sunscreen is still the business though, please wear it). And even though some foods lose their health benefits when you cook them, the antioxidants in the mushrooms appear heat-stable and thus unaffected. "It's preliminary, but you can see that countries that have more ergothioneine in their diets, countries like France and Italy, also have lower incidences of neurodegenerative diseases, while people in countries like the United States, which has low amounts of ergothioneine in the diet, have a higher probability of diseases like Parkinson's Disease and Alzheimer's," Beelman continued in the news release. But, it's something to look into, especially because the difference between the countries with low rates of neurodegenerative diseases is about 3 milligrams per day, which is about five button mushrooms each day."
– Hoping to age gracefully? You might consider tossing some porcini mushrooms in the shopping cart. A new study out of Penn State finds that mushrooms in general contain high levels of antioxidants ergothioneine and glutathione, and some varieties are more potent than others. "What we found is that, without a doubt, mushrooms are [the] highest dietary source of these two antioxidants taken together, and that some types are really packed with both of them," Robert Beelman says in a release. The wild porcini mushroom popular in Italy, for example, had "by far" the highest amounts of any mushroom tested. But though white button mushrooms had the least, they still had more than most other foods, reports Newsweek. And there's no need to eat mushrooms raw, because cooking doesn't seem to affect the compounds. So what makes ergothioneine and glutathione so helpful? Research is ongoing, but it's believed they protect against atoms known as free radicals, which damage or age the body over time, per New Atlas. Beelman even floats the provocative stat that countries such as Italy and France, where people typically eat the equivalent of 5 button mushrooms a day more than Americans, have lower rates of neurodegenerative diseases like Parkinson's and Alzheimer's. He cautions that it's way too early to draw any firm conclusions from that, but says researchers will explore the topic. (Glutathione might also lighten skin.)