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For a start whole benzoin will contain traces of dozens to hundreds of
natural chemicals both the good ones and the bad ones. The exact chemicals causing sensitization may not be known. Incidentally, even
benzoic acid is a recognised allergen within dermatology.
Secondly the fact that an extract is used safely in food has little
relationship to the same extract being used in skin care products. For
example a single drop of GENUINE cinnamon bark oil in an apple pie is
fine, but it should never ever be used on the skin unless its activity
has been modified by other additives.
In Europe and doubtless in the USA, there is increasing evidence that a
significant number of the population (possibly up to 10%) are becoming
sensitized by the use of routine cosmetic and medicated skin
applications. Therefore the fact something has been used for years is
without any meaning at all in regard to safety. Many people thought
smoking cigarettes was perfectly safe, now look at the results!
The incidence of generalized allergic reactions is rising at a
staggering rate throughout the developed world. Part of the causes are
of cause environmental, but part are almost certainly due to what we put
in and ON our bodies.
Incidentally, although rosemary extract (not oil) is a superb
preservative for fats, to the best of my knowledge it has not undergone
formal safety evaluation trials for use in skin care products. People
seem to forget that any preservative that has a powerful anti microbial
activity is just as likely to kill your skin cells as the microbes.
Think about that one!
As a herbalist and essential oils educator, give me a well tried and
tested synthetic preservative any day to a natural one, particularly when
the safety of the natural one has not been adequately tested. Natural
is NOT inevitably safe as many seem to think.
Finally for those that do not know, sensitization is not just an
irritation of the skin. It is an immune system response and can be
temporary, but can be with you for LIFE. Those that become cosmetic
ingredient sensitized can have the most appallingly disfiguring skin
conditions, particularly in young women when it is on their faces or
neck. No one making so-called "natural" products should ever forget
what the results can be if they do not educate themselves properly on
safety. Don't think your insurance will cover you, they will opt out as
soon as they learn you have manufactured products against the advice of
best trade practice.
Martin Watt, UK.
CERT. PHYT. MEDICAL HERBALIST
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