Whether the flavors or fragrances are constructed of natural or synthetic ingredients we have established that both can contribute to the
list of safe ingredients and to
the list of un-safe ingredients. The
origin of the ingredient is a moot point – it is the
structure of the ingredient that determines its
toxicity / safety profile. [To be clear, the source
can be a differentiating factor IF there are multiple ingredients associated with one source or the other including but not limited to structural isomers of the principal ingredient(s). For instance nature frequently creates
l (or
d) isomers while synthetic versions are usually
racemic mixtures (containing both
d &
l isomers in equal quantities).]
In the group of ingredients that are routinely used by many to construct fragrances and sometimes flavors there are items for which their safe use has been observed for decades and even longer and yet there are still detractors who claim that
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