Thank you for your feedback. There is a difference between saying vitamins are petrochemicals and being derived from petrochemicals. My article states that they are derived from petrochemicals this means that the coal tar and petrochemicals are used to isolate certain chemicals (which we call vitamins) which means there will be contaminants from this process.
I will not be taking natural vitamins. I only take whole food. There is no such thing as a natural vitamin at all.
I will not take synthetic either - I feel sick every time I do.
Nitpicking doesn't help. Derived from is also misleading in some instances.