Definition of "naturally occurring" [naturally occurring]
Existing by nature and without artificial aid(adjective)
WordNet. Princeton University. 2010.
Use "naturally occurring" in a sentence
"Glutathione is a naturally occurring antioxidant that is depleted in patients with wasting diseases such as sepsis, cancer, and AIDS."
"“What we found was that the apple phenolics, which are naturally occurring antioxidants found in fresh apples, can protect nerve cells from neurotoxicity induced by oxidative stress,” Dr. Lee states."
"Over the course of more than a decade, he connected mottling to the naturally occurring presence of fluoride in drinking water."