Intresting take. But there is no good proof, of what the body should not understand on a vitamin. In the end it is some kind of salt or molecul. Nothing more to understand about it.
Discussion
There’s definitely work that shows synthetic vitamins aren’t understood by the body the same way as native vitamins in food. For example, synthetic vitamin A in the form of retinyl palmitate can be toxic in high doses as it builds up in the body versus Vitamin A in betcarotene which is much more easily absorbed by the body.