You ignorance of biochemistry is showing. It's the same molecule that your body makes and it doesn't know or care if it's "synthetic" just like your car doesn't care which gas station you got gasoline from (also BTW here's some info from a guy who's worked in oil for over a decade, all gas stations are using a random blend from all brands it's just the way that the pipelines they share work.)
You ignorance of biochemistry is showing. It's the same molecule that your body makes and it doesn't know or care if it's "synthetic" just like your car doesn't care which gas station you got gasoline from (also BTW here's some info from a guy who's worked in oil for over a decade, all gas stations are using a random blend from all brands it's just the way that the pipelines they share work.)