There is no FDA definition of "natural". So all kinds of products can be labeled "natural" and still be useless or even harmful for consumers. What's worse, the FDA will leave it undefined for the time being. This is a problem for everyone using the term to label their products:
"A lack of a uniform approach to the [natural] term has resulted in inconsistent product claims, consumer confusion, and even lawsuits against food companies accused of misleading consumers." - Lorraine Heller, FoodNavigator-USA.com
The trouble with "natural" is a company can start with a natural source, like a plant, then heat it so much that the enzymes die. They can also add chemicals or other artificial ingredients and still call it "natural". That's why the word has no meaning.
Supplements only have to be ten percent natural in order to legally make this claim. That's why more than ninety-five percent of all vitamins sold today are synthetic. This is what separates BarleyLife® Xtra, which is made from real food, from the Amazon and grocery store cheapies.
To learn more, read this educational guide, "How Safe Are Your Vitamins?"