noun
natural form; native form; naturally occurring
Used especially in scientific or nutritional contexts to refer to the form of a substance (e.g., a vitamin) as it exists in nature, as opposed to a synthetic version.
このサプリメントにはビタミンEの天然型が使われています。
This supplement uses the natural form of vitamin E.
天然型の成分は合成型より吸収されやすいと言われている。
It is said that naturally occurring ingredients are absorbed more easily than synthetic ones.