An inhalable product shall not contain any of the following:
(a) Flavorings other than natural terpenes.
(b) Polyethylene glycol (PEG).
(c) Vitamin E acetate.
(d) Medium chain triglycerides (MCT oil).
(e) Squalene or squalane.
(f) Any other substance that the department finds to be a danger to public health.