I really object to marketing use of the word 'natural' and 'chemicals'. I don't mean to single you out - these concepts are widespread in marketing.
Plenty of 'natural' things are bad, like small pox, the Ebola virus and salmonella.
Plenty of 'unnatural' things are good, like antibiotics to treat infection.
All matter is made from chemicals. Whether a chemical like penicillin or salt is synthesised in a lab, or extracted from the ocean, holds no baring on whether that chemical is good for you.
- EDIT - Generalised the penicillin example.