No, it's not the same. Molecules act very differently than the individual elements that make the molecule. Water does not behave similarly to hydrogen or oxygen

No, it's not the same. Molecules act very differently than the individual elements that make the molecule. Water does not behave similarly to hydrogen or oxygen, and humans aren't plants, which can break water into component elements. What happens to the bromine when humans ingest brominated vegetable oil? Something very different than what happens when we ingest water, which always stays stable as a water molecule.