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.
Compound of 天然 (natural) + 型 (type, form).