The phrase "natural chemicals" refers to substances or compounds that are found in nature, rather than being man-made or artificial. These chemicals are derived from plants, animals, or other natural sources. Full definition
If god made the earth for us... why do we have cliffs to fall of, why do we have natural chemicals in the environment that kill us? (religion.blogs.cnn.com)
Newly discovered creatures could also provide a gold mine of natural chemical compounds useful as pharmaceuticals or for industrial applications. (discovermagazine.com)
Beyond that, there are different natural chemical produced during the fermentation process that are beneficial to both skin and health. (thepunctuationmark.com)