Chance, your denying that vaccines have eradicated many diseases is ludicrous, as Charlie Hall indicated.
Second, your claim that nutrients are different than chemicals is also strange. All the vitamins are chemicals, so does that make them bad for you? They are made from the same chemical elements as the things you call chemicals. We can produce many vitamins in the lab and there is no difference between the original and the lab product.
As far as whether natural products are better than synthetic products, there are harmful natural products as well, such as poisonous mushrooms, snake venom, poison ivy, etc.
All things are made from atoms which are all made from electrons, protons and neutrons. It takes great chochma to understand what combinations of atoms are good for you, and what are bad for you.
Is sodium good for you? Absolutely, as it functions in ionic transport which is how the nervous system conducts impulses to and from the brain.
Is nitrogen good for you, absolutely, as they are the components of amino acids which are the building blocks of all proteins which do all the important work in your body, such as construct the lens of your eye, the retina, transduce light into nerve impulses, replicate DNA, digest food, etc. etc. etc.
However, mix sodium and nitrogen, and you get sodium azide which is a deadly compound that is used as a preservative in labs.
Only expert biochemists can know for sure what is good for you and what is not, and they only know a small part of the story so far of how the body works, because it is so complex.
So while science doesn’t have all the answers, the quacks certainly don’t. Science has done great things so far, but has a long way to go yet.
The FDA tries its best to throughly test any product for safety and efficacy using sophisticated statistical methods and trials. While they may be wrong on occasion, it is far better than having a bunch of new-age food-fad gurus who do not know biochemistry making these decisions.