The article is really talking about the granulated extracts like PureVia and Truvia. Those never should have been allowed to be called "natural."
Stevia leaf is related to "Reb A" manufactured sweeteners in more or less the same way that coca leaves are related to crack. People have chewed coca leaves or drunk coca tea for a thousand years or more with very little ill effect. You can even bring fresh raw coca leaves into the country in your suitcase and most Customs/DEA agents will wave you through. It's when you extract and concentrate certain compounds out of the leaves and process them with other chemicals that you start running into potential dangers. I don't know how many stevia leaves it would take to equal a teaspoon of the commercial sweetener, but I'm sure it's a LOT more than you would normally eat in a day.
I warn people against the commercial stevia-based sweeteners all the time, but I really wouldn't worry about the leaves at all.
SparkPeople, SparkCoach, SparkPages, SparkPoints, SparkDiet, SparkAmerica, SparkRecipes, DailySpark, and other marks are trademarks of SparkPeople, Inc. All Rights Reserved.
SPARKPEOPLE is a registered trademark of SparkPeople, Inc. in the United States, European Union, Canada, and Australia. All rights reserved.