An end to mascara testing on animals could be in sight
thanks to tiny organisms nicknamed 'slipper' and 'eyelash'.
Mascara is a mild irritant, and rabbits have, historically,
been used to test how much discomfort new products can cause. However, a
cheaper and more reliable test is now being developed by scientists at the
University of Liverpool, involving miniscule protozoa. This will remove animal
cruelty from the equation.
The scientists from the University's Institute of
Integrative Biology were able to examine potential toxicity caused by mascara, based
on the growth of the protozoa when placed in experimental chambers containing
Six different brands of mascara were tested, by painting it
on small glass plates and placing these in the chambers. The protozoa and their
food were then added. The protozoa – the slipper ciliate (Paramecium caudatum)
and the eyelash ciliate (Blepharisma japonicum) – were chosen carefully because
of their large size, their historic use as model organisms, and their genetic
similarities to humans.
Simpler and cheaper
Their large size enabled the scientists to visually measure
population growth using a microscope, and they were able to show that this
varied according to the brand of mascara and the amount in the chamber. There
was a substantial difference between brands, with some killing the protozoa and
others not harming them at all.
Dr David Montagnes, who supervised the project suggests:
"This test has great potential for reducing the use of rabbits as it is
both cheap and reliable, and while the protozoa have a similar metabolism to
animals, they are not classed as such. Indeed, the traditional test used on
rabbits – the Draize test – was developed more than 40 years ago and is both
time consuming and expensive, as well as giving rise to ethical issues."
Montagnes went on to add: "When you can develop a
simpler and cheaper alternative, there is really no need to test cosmetics on
rid of old cosmetics
The research was part of an undergraduate final-year
research project (the senior author is the student, Hayley Thomason) and as such
it was funded by the School of Life Sciences at the University of Liverpool. It
is now published in the International Journal of Cosmetic Science.
Hayley said: "I'm very keen to establish a career as a
cosmetic scientist and having the opportunity to work on a research project
like this is an important step on that path."
(Picture: Woman applying mascara from Shutterstock)