Microbiologists have discovered that using free make-up samples in shops could spread harmful diseases and contagion like herpes and salmonella.
In a report published by The Daily Mailit is understood that make-up testers often available in department stores, beauticians or chemists are not good for your skin.
Lipstick used by multiple people can carry droplets of saliva which is known to carry the herpes virus.
Eyeliners and mascara have also been found to cause the sensation known as "pink-eye" whereas other products could carry salmonella or e.coli.
Furthermore, make-up brushes can also gather nasty bacteria like Staph aureus and streptococcus.
Previous to this you have probably never given a second thought to the hidden dangers of testers.
Dr Amreen Bashir of Aston University told the Mail:
Most people would never consider sharing a toothbrush with a stranger, yet they happily use make-up testers.
There is a real risk of catching bacterial infections and herpes, as we all have different organisms living on us and one cosmetic tester can be used by 30 or 40 different people, which spreads the risk of infection.
Yet the problems have come to light recently after an American woman sued a beauty company after she claimed to contract herpes through their products.
The Mail claim that a study of 67 cosmetics in 2016 found that three-quarters of these items contained the staphylococcus bug.
The bug can usually live on a persons skin and not cause any harm but by shared make-up could unleash a more deadly version, known commonly as MRSA.
This unfortunate news isn't exclusive to just in-store testers either and can be spread old make-up that has been sitting in a bag for ages.
Dr Bashir, added:
Studies have revealed that 43 per cent of eyeliners and mascara wands contain contaminants.
I know many friends who have been left with a “pink eye” after sharing mascara or using ancient mascara that’s been sitting in their make-up bags.
If all of these horror stories tell us one thing, it’s to stay away from sharing make-up products, both among your friends and especially in cosmetic stores.