Several species have been found to contain naturally occurring calanolides in various quantities.

Several foods can naturally contain toxins, many of which are not produced by bacteria.

But it's okay to eat and drink foods that naturally contain vitamin C.

The logic of such views naturally contained a number of contradictions.

Rock minerals naturally contain certain elements and not others.

He said rocks in the ocean naturally contain asbestos.

Red yeast rice naturally contains several ingredients that may help control cholesterol levels.

The soil in Australia naturally contains salt, having accumulated over thousands of years.

It naturally contains many of the micronutrients needed by plants, such as selenium.

Some lead, naturally containing a small percentage of silver, was loaded into the central pot and melted.