“Everything we eat is chemicals.
Most occur in nature, some don’t.”
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Depends on what you mean by “eat.”
Prescription drugs are all un-natural and deadly, and putting them down your gullet is a form of eating.
“Some man-made chemicals are exact replicas of natural compounds.”
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A statement that omits 99% of the relevant facts.
Our bodies use just about every known naturally occuring chemical, but not in their pure state. We are designed to consume only once-living substances, that contain literally millions of different chemical compounds, but arranged in complex structures that are readily useable by our bodies.
Our bodies cannot synthesize nucleic acids from raw isolated compounds; we make our nucleic acid from the existing nucleotides in our food. If we ingest things that are not once living, we must destroy some of our own cells to deal with those substances. In most cases those destroyed cells are in our kidneys, where the non-life garbage must go to be dumped.
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